While catching a ball, a player pulls down his hands to lower the– (1) force (2) momentum (3) impulse (4) catching time

While catching a ball, a player pulls down his hands to lower the– (1) force (2) momentum (3) impulse (4) catching time
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While catching a ball, a player pulls down his hands to lower the - (1) force/cy (2) momentum (3) impulse (4) catching time

Description : While catching a ball, a player pulls down his hands to lower the - (1) force/cy (2) momentum (3) impulse (4) catching time

Last Answer : (3) impulse

While catching a ball, a player pulls down his hands to lower the – (1) force (2) momentum (3) impulse (4) catching time

Description : While catching a ball, a player pulls down his hands to lower the – (1) force (2) momentum (3) impulse (4) catching time

Last Answer : (2) momentum Explanation: A cricketer lowers his hands while taking a catch to decrease the rate of momentum. Cricketers increase the time by pulling their hand's backward with the ball while taking a ... stop afterwards. If the truck were lighter, or moving slower, then it would have less momentum.

Out of the following pairs, which one does not have identical dimension? (1) Moment of inertia and moment of a force (2) Work and Torque (3) Angular momentum and Planck's constant (4) Impulse and Momentum

Description : Out of the following pairs, which one does not have identical dimension? (1) Moment of inertia and moment of a force (2) Work and Torque (3) Angular momentum and Planck's constant (4) Impulse and Momentum

Last Answer : (1) Moment of inertia and moment of a force

What is impulse equal to? (1) Change in momentum (2) Change in force (3) Change in velocity (4) Change in acceleration

Description : What is impulse equal to? (1) Change in momentum (2) Change in force (3) Change in velocity (4) Change in acceleration

Last Answer : (1) Change in momentum Explanation: Impulse is a quantity that describes the effect of a net force acting on an object. The impulsemomentum theorem states that the change in momentum of an object equals the impulse applied to it.

Which of the following physical quantities has no dimension? (1) Force (2) Momentum (3) Impulse (4) Angle

Description : Which of the following physical quantities has no dimension? (1) Force (2) Momentum (3) Impulse (4) Angle

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An ice skater is rotating with her arms extended. When she pulls in her arms her rate of rotation increases. Which of the following statements dealing with the process is TRUE? w) Her moment of inertia is increased. x) Kinetic energy is conserved. y) The skater does work when pulling in her arms. z) Angular momentum is increased.

Description : An ice skater is rotating with her arms extended. When she pulls in her arms her rate of rotation increases. Which of the following statements dealing with the process is TRUE? w) Her moment of ... conserved. y) The skater does work when pulling in her arms. z) Angular momentum is increased.

Last Answer : ANSWER: Y -- THE SKATER DOES WORK WHEN PULLING IN HER ARMS 

A soccer fan, upset by the defeat of his favorite team, slept restlessly. In his dream a goalkeeper was practicing in a large unfurnished room, tossing a soccer ball against the wall and then catching it.But the goalkeeper grew smaller and smaller and then changed into a ping-pong ball while the soccer ball was swelled up into a huge cast-iron ball. The iron ball circled round madly, trying to crush the ping-pong ball, how did the ping-pong find safety whithout leaving the floor? -Riddles

Description : A soccer fan, upset by the defeat of his favorite team, slept restlessly. In his dream a goalkeeper was practicing in a large unfurnished room, tossing a soccer ball against the wall and then ... crush the ping-pong ball, how did the ping-pong find safety whithout leaving the floor? -Riddles

Last Answer : If the ping-pong ball rolls flush against the wall, the cast-iron ball cannot crush it. Those who know geometry can determine that if the diameter of a large ball is at least 5.83 (3+2(square root of ... is larger than a soccer ball is more than 4.83 times as large in diameter as a ping-pong ball.

A baseball bat strikes a ball with a force of 30 newtons. If the ball was in contact with the bat for 1/10 of a second, what impulse did the ball receive?

Description : A baseball bat strikes a ball with a force of 30 newtons. If the ball was in contact with the bat for 1/10 of a second, what impulse did the ball receive?

Last Answer : ANSWER: 3 NEWTON-SECONDS

Which of the following do not have identical dimensions? (A) Momentum and impulse (B) Torque and energy (C) Torque and work (D) Moment of a force and angular momentum

Description : Which of the following do not have identical dimensions? (A) Momentum and impulse (B) Torque and energy (C) Torque and work (D) Moment of a force and angular momentum

Last Answer : (D) Moment of a force and angular momentum

The dimension of which of the following is the same as that of impulse? (1) Volume (2) Momentum (3) Torque (4) Change in the rate of momentum

Description : The dimension of which of the following is the same as that of impulse? (1) Volume (2) Momentum (3) Torque (4) Change in the rate of momentum

Last Answer : (2) Momentum Explanation: The quantity of impulse is force x time interval. In classical mechanics, linear momentum or translational momentum is the product of the mass and velocity of an object. For ... stop afterwards. If the truck were lighter or moving slower, then it would have less momentum.

The dimension of which of the following is the same as that of impulse ? (1) Volume (2) Momentum (3) Torque (4) Change in the rate of momentum

Description : The dimension of which of the following is the same as that of impulse ? (1) Volume (2) Momentum (3) Torque (4) Change in the rate of momentum

Last Answer : Momentum

A boy sitting in a rail road car throws a ball straight up into the air. The ball will fall back into his hands when the rail road car is a.moving at constant velocity b.accelerating forward while going around a curve of radius equal to the maximum height attained by the ball c.107 dynes d.accelerating forwardA block A is dropped down a smooth inclined plane, while another identical block B is released for free fall from the same height e.decelerating

Description : A boy sitting in a rail road car throws a ball straight up into the air. The ball will fall back into his hands when the rail road car is a.moving at constant velocity b.accelerating ... inclined plane, while another identical block B is released for free fall from the same height e.decelerating

Last Answer : a. moving at constant velocity

The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which gives correct identification and main function and / or characteristic. (a) C - Alveoli - Thin walled vascular bag like structures for exchange of gases. (b) D - Lower end of lungs - Diaphragm pulls it down during inspiration. (c) A - Trachea - Long tube supported by complete cartilaginous rings for conducting inspired air. (d) B - Pleural membrane - Surround ribs on both sides to provide cushion against rubbing.

Description : The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which gives correct identification and main function and / or characteristic. (a) C - ... air. (d) B - Pleural membrane - Surround ribs on both sides to provide cushion against rubbing.

Last Answer : (a) C - Alveoli - Thin walled vascular bag like structures for exchange of gases.

What G is a force that pulls thing down to earth?

Description : What G is a force that pulls thing down to earth?

Last Answer : What is the answer ?

The rate of change of linear momentum of a body falling freely under gravity is equal to it's (1) Kinetic Energy (2) Weight (3) Potential Energy (4) Impulse

Description : The rate of change of linear momentum of a body falling freely under gravity is equal to it's (1) Kinetic Energy (2) Weight (3) Potential Energy (4) Impulse

Last Answer : (2) Weight Explanation: Rate of change of impulse equals the force. In case of freely falling body the only force is the weight.

A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that – (1) The rubber ball suffers greater change in momentum (2) The metal ball suffers greater change in momentum (3) Both suffer the same change in momentum (4) The initial momentum of the rubber ball is greater than that of the metal ball

Description : A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that - ... change in momentum (4) The initial momentum of the rubber ball is greater than that of the metal ball

Last Answer : (1) The rubber ball suffers greater change in momentum

A firecracker is placed in the middle of a cluster of stationary billiard balls. The firecracker-billiard ball system sits on a frictionless surface. As the firecracker explodes, the balls scatter. What is the momentum of the SYSTEM after the explosion of the firecracker? w) greater than the momentum of the system before the explosion x) equal to the combined speed of the balls y) equal to the mass of the balls z) zero

Description : A firecracker is placed in the middle of a cluster of stationary billiard balls. The firecracker-billiard ball system sits on a frictionless surface. As the firecracker explodes, the balls scatter. What is the momentum ... to the combined speed of the balls y) equal to the mass of the balls z) zero

Last Answer : ANSWER: Z -- ZERO

A girl throws a ball vertically upward, what is the MOMENTUM of the ball at its highest point?

Description : A girl throws a ball vertically upward, what is the MOMENTUM of the ball at its highest point?

Last Answer : ANSWER: ZERO

A girl throws a 0.1 kilogram ball at a wall. The ball hits the wall perpendicularly with a velocity of 5 meters per second and then bounces straight back with a velocity of 4 meters per second. The change in the momentum of the ball is: w) 0.1 kilogram-meters per second x) 0.4 kilogram-meters per second y) 0.5 kilogram-meters per second z) 0.9 kilogram-meters per second

Description : A girl throws a 0.1 kilogram ball at a wall. The ball hits the wall perpendicularly with a velocity of 5 meters per second and then bounces straight back with a velocity of 4 meters per second. The ... .4 kilogram-meters per second y) 0.5 kilogram-meters per second z) 0.9 kilogram-meters per second

Last Answer : ANSWER: Z -- 0.9 KILOGRAM-METERS PER SECOND 

A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that (1) The rubber ball suffers greater change in momentum (2) The metal ball suffers greater change in momentum (3) Both suffer the same change in momentum (4) The initial momentum of the rubber ball is greater than that of the metal ball

Description : A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that ( ... change in momentum (4) The initial momentum of the rubber ball is greater than that of the metal ball

Last Answer : The rubber ball suffers greater change in momentum 

Of the following terms, which is the product of force and time? Is it: w) impulse x) power y) energy z) work

Description : Of the following terms, which is the product of force and time? Is it: w) impulse x) power y) energy z) work

Last Answer : ANSWER: W -- IMPULSE

A man pulls a cart with 100 N force from rest with an acceleration of 10 m/sec2 for 10 seconds. The work done by him is a.500 KJ b.50.96 KJ c.101.92 KJ d.None of the above e.Tapered bearing

Description : A man pulls a cart with 100 N force from rest with an acceleration of 10 m/sec2 for 10 seconds. The work done by him is a.500 KJ b.50.96 KJ c.101.92 KJ d.None of the above e.Tapered bearing

Last Answer : a. 500 KJ

what is the acceleration of a 1.4 kg object if the gravitational force pulls downward on it , but air resistance pushes upward on it with a force of 2.5 N?

Description : what is the acceleration of a 1.4 kg object if the gravitational force pulls downward on it , but air resistance pushes upward on it with a force of 2.5 N?

Last Answer : if g = 10(m/s)/s then force down = ma = 10*1.4=14n14n-2.5n=11.5na=f/m = 11.5/1.4 = 8.21 (m/s/)s

What do you call a force that pulls an object?

Description : What do you call a force that pulls an object?

Last Answer : What is the answer ?

What is the name of a force that pulls object towards the centre of the earth?

Description : What is the name of a force that pulls object towards the centre of the earth?

Last Answer : gravity

What is a force that pulls outward from the center of a circle?

Description : What is a force that pulls outward from the center of a circle?

Last Answer : This might be the description of centrifugal force.

The horse pulls the cart because of (a) The force that the horse exerts on the ground (b) The force that the horse exerts on the cart (c) The force that the ground exerts on the horse (d) The force that the cart exerts on the horse

Description : The horse pulls the cart because of (a) The force that the horse exerts on the ground (b) The force that the horse exerts on the cart (c) The force that the ground exerts on the horse (d) The force that the cart exerts on the horse

Last Answer : Ans:(c)

A coal having higher volatile matter content, has lower (A) Smoking tendency on burning (B) Coke oven gas yield on carbonisation (C) Chance of catching fire during storage in open space (D) Ignition temperature

Description : A coal having higher volatile matter content, has lower (A) Smoking tendency on burning (B) Coke oven gas yield on carbonisation (C) Chance of catching fire during storage in open space (D) Ignition temperature

Last Answer : (D) Ignition temperature

When a bat hits a ball the impulse is?

Description : When a bat hits a ball the impulse is?

Last Answer : It is equivalent to the change in momentum of the ball.

If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same - (1) velocity (2) momentum (3) acceleration (4) kinetic energy

Description : If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same - (1) velocity (2) momentum (3) acceleration (4) kinetic energy

Last Answer : (2) momentum Explanation: If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same momentum.

If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same - (1) velocity (2) momentum (3) acceleration (4) kinetic energy

Description : If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same - (1) velocity (2) momentum (3) acceleration (4) kinetic energy

Last Answer : (2) momentum Explanation: If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same momentum.

Which of the following pair are vector quantities? w) time and space x) force and momentum y) energy and time z) momentum and mass e) mass

Description : Which of the following pair are vector quantities? w) time and space x) force and momentum y) energy and time z) momentum and mass e) mass

Last Answer : ANSWER: X -- FORCE and MOMENTUM 

Newton's second law states that the net force acting on a body is equal to the body's time rate of change of: w) acceleration x) mass y) momentum z) inertia

Description : Newton's second law states that the net force acting on a body is equal to the body's time rate of change of: w) acceleration x) mass y) momentum z) inertia

Last Answer : ANSWER: Y -- MOMENTUM

The number of times a unit of money exchanges hands during a unit period of time is known as: a) velocity of circulation of money b) speed of circulation of money c) momentum of circulation of money d) count of circulation of money

Description : The number of times a unit of money exchanges hands during a unit period of time is known as: a) velocity of circulation of money b) speed of circulation of money c) momentum of circulation of money d) count of circulation of money

Last Answer : a) velocity of circulation of money

What should a person on a freely rotating turn table do to decrease his (angular) speed? (1) Bring his hands together (2) Raise his hands up (3) Spread his hands outwards (4) Sit down with raised hands

Description : What should a person on a freely rotating turn table do to decrease his (angular) speed? (1) Bring his hands together (2) Raise his hands up (3) Spread his hands outwards (4) Sit down with raised hands

Last Answer : (3) Spread his hands outwards Explanation: The answer is related to the conservation of angular momentum. The person on the rotating table will maintain approximately the same angular momentum during the spin. ... by reducing the distance of the mass of her arms and hands from the axis of rotation.

What should a person on a freely rotating turn table do to decrease his (angular) speed ? (1) Bring his hands together (2) Raise his hands up (3) Spread his hands outwards (4) Sit down with raised hands

Description : What should a person on a freely rotating turn table do to decrease his (angular) speed ? (1) Bring his hands together (2) Raise his hands up (3) Spread his hands outwards (4) Sit down with raised hands

Last Answer : Spread his hands outwards

Plank's constant has the dimensions of (1) energy (2) linear momentum (3) angular momentum (4) force

Description : Plank's constant has the dimensions of (1) energy (2) linear momentum (3) angular momentum (4) force

Last Answer : (1) energy Explanation: The Planck's constant (h) can be defined as a pro-portionality constant that relates the energy (E) of a photon to the frequency (?) of its associated electro-magnetic ... Planck constant is named after Max Planck, the instigator of quantum theory, who discovered it in 1900.

Which of the following is a scalar quantity? (1) Velocity (2) Force (3) Angular momentum (4) Electrostatic potential

Description : Which of the following is a scalar quantity? (1) Velocity (2) Force (3) Angular momentum (4) Electrostatic potential

Last Answer : (3) Angular momentum Explanation: The electrostatic potential at any point in an electric field is defined as the work done in bringing a unit positive charge from infinity to that point against the electric force of the field.

If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states that? (1) Newton’s first law (2) Newton’s Second Law (3) Newton’s Third Law (4) Principle of conservation of linear momentum

Description : If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states that? (1) Newton’s first law (2) Newton’s Second Law (3) Newton’s Third Law (4) Principle of conservation of linear momentum

Last Answer : (4) Principle of conservation of linear momentum Explanation: Conservation of linear momentum. The principle that the linear momentum of a system has constant magnitude and direction if the system is subjected to no external force. Also called law of conservation of linear momentum

When net torque is zero, will be constant - (1) force (2) angular momentum (3) linear momentum (4) acceleration

Description : When net torque is zero, will be constant - (1) force (2) angular momentum (3) linear momentum (4) acceleration

Last Answer : (2) angular momentum Explanation: Since a torque (rate of change of angular momentum analogous to force) applied over time is equivalent to a change in angular momentum, then if torque is zero, angular momentum is constant.

If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this? (1) Newton first law (2) Newton second law (3) Newton third law (4) Principle of conservation of linear momentum

Description : If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this? (1) Newton first law (2) Newton second law (3) Newton third law (4) Principle of conservation of linear momentum

Last Answer : (4) Principle of conservation of linear momentum Explanation: Principle of conservation of linear momentum states If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant.

Rate of change of momentum is - (1) Area (2) Pressure (3) Force (4) Velocity

Description : Rate of change of momentum is - (1) Area (2) Pressure (3) Force (4) Velocity

Last Answer : (3) Force Explanation: According to Newton’s Second Law of motion, the rate of change of momentum of an object is directly proportional to the resultant force applied and is in the direction of the resultant force.

Which of the following pairs of physical quantities have the same dimensions? (1) Force and Power (2) Work and Power (3) Work and Energy (4) Momentum and Power

Description : Which of the following pairs of physical quantities have the same dimensions? (1) Force and Power (2) Work and Power (3) Work and Energy (4) Momentum and Power

Last Answer : (3) Work and Energy Explanation: The term energy is used to describe the capacity of a system to do work on another system. Energy of all types (Surface Tension, Kinetic, Potential etc.) have the same dimension and unit as that of Work.

Kilowatt-hour is the unit of : (1) Energy (2) Power (3) Force (4) Momentum

Description : Kilowatt-hour is the unit of : (1) Energy (2) Power (3) Force (4) Momentum

Last Answer : (1) Energy Explanation: The kilowatt hour, or kilowatthour, is a unit of energy equal to 1000 watt hours or 3.6 mega-joules For constant power, energy in watt hours is the product of ... kilowatt hour is most commonly known as a billing unit for energy delivered to consumers by electric utilities.

Which of the following physical quantities changes or tends to change the state of rest or of uniform motion of a body in a straight line? (1) Momentum (2) Mass (3) Force (4) Inertia

Description : Which of the following physical quantities changes or tends to change the state of rest or of uniform motion of a body in a straight line? (1) Momentum (2) Mass (3) Force (4) Inertia

Last Answer : (3) Force Explanation: Force is an agent which changes or tends to change the state of rest or of uniform motion of a body.

If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this? (1) Newton first law (2) Newton second law (3) Newton third law (4) Principle of conservation of linear momentum

Description : If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this? (1) Newton first law (2) Newton second law (3) Newton third law (4) Principle of conservation of linear momentum

Last Answer : (4) Principle of conservation of linear momentum Explanation: Principle of conservation of linear momentum states if no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant.

Interaction that causes an object's momentum to change is A. velocity B. acceleration C. power D. force

Description : Interaction that causes an object's momentum to change is A. velocity B. acceleration C. power D. force

Last Answer : force

Resultant force acting on object and rate of change of linear momentum are A. inversely related B. not related at all C. directly related D. directly proportional

Description : Resultant force acting on object and rate of change of linear momentum are A. inversely related B. not related at all C. directly related D. directly proportional

Last Answer : directly related

Direction of momentum is direction of object's A. mass B. acceleration C. velocity D. frictional force

Description : Direction of momentum is direction of object's A. mass B. acceleration C. velocity D. frictional force

Last Answer : velocity

If the resultant force acting on a body of constant mass is zero, the body's momentum is: w) increasing x) decreasing y) always zero z) constant

Description : If the resultant force acting on a body of constant mass is zero, the body's momentum is: w) increasing x) decreasing y) always zero z) constant

Last Answer : ANSWER: Z -- CONSTANT