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.
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
Description : The purpose of reinforcement in pre-stressed concrete is (A) To provide adequate bond stress (B) To resist tensile stresses (C) To impart initial compressive stress in concrete (D) All of the above
Last Answer : Answer: Option C
Description : Homeostasis is (a) tendency to change with change in environment (b) tendency to resist change (c) disturbance in regulatory control (d) plants and animal extracts used in homeopathy.
Last Answer : (b) tendency to resist change
Description : Homeostasis is (a) tendency of biological systems to change with change in environment (b) tendency of biological systems to resist change (c) disturbance of self regulatory system and natural controls (d) biotic materials used in homeopathic medicines.
Last Answer : (b) tendency of biological systems to resist change
Description : A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to – (1) Outward pull on him (2) Inertia of motion (3) Change in momentum (4) Change in acceleration
Last Answer : (2) Inertia of motion Explanation: This is inertia of direction. It is the ability of body to be in a state of direction of motion for example sun holds planets in a fixed elliptical path .this ... at rest or moving with a constant velocity. It is the property possessed by a body to resist change.
Description : A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to (1) Outward pull on him (2) Inertia of motion (3) Change in momentum (4) Change in acceleration
Last Answer : Inertia of motion
Description : The spokes used in the wheel of a bicycle increase its – (1) Moment of inertia (2) Velocity (3) Acceleration (4) Momentum
Last Answer : (1) Moment of inertia Explanation: A spoke is one of some number of rods radiating from the center of a wheel (the hub where the axle connects), connecting the hub with the round ... synthetic fibers, are also occasionally used. Metal spokes used in bicycles also increase the moment of inertia.
Description : The spokes used in the wheel of a bicycle increase its (1) Moment of inertia (2) Velocity (3) Acceleration (4) Momentum
Last Answer : Moment of inertia
Description : Why is weightlessness experienced while orbiting the earth in space ships? (1) Inertia (2) Acceleration (3) Zero gravity (4) None of these
Last Answer : (4) None of these Explanation: The reason astronauts experience weightlessness which orbiting the earth in spaceships is that they are in free fall. A spacecraft in orbit is falling towards the Earth, because ... in its orbit fast enough that the path it follows is a curve that is a closed ellipse.
Description : The maximum twisting moment a shaft can resist, is the product of the permissible shear stress and (A) Moment of inertia (B) Polar moment of inertia (C) Polar modulus (D) Modulus of rigidly
Last Answer : (C) Polar modulus
Description : When a running car stops suddenly, the passengers tends to lean forward because of: (1) centrifugal force (2) inertia of rest (3) inertia of motion (4) gravitational force
Last Answer : (3) inertia of motion Explanation: When a running car stops suddenly, the passengers tend to lean forward due to inertia of motion. Inertia is that property of a body due to which it resists a change in its state of rest or of uniform motion.
Last Answer : inertia of motion
Description : Horizontal acceleration due to earthquake results in (A) Hydrodynamic pressure (B) Inertia force into the body of the dam (C) Both (A) and (B) (D) None of the above
Description : An object whose velocity is changing is said to be in a state of A. acceleration B. rest C. equilibrium D. Brownian motion
Last Answer : acceleration
Description : A moving body on Earth ordinarily comes to rest by itself because of the (a) Law of inertia (b) Forces of friction (c) Conservation of momentum (d) Gravity
Last Answer : Ans:(b)
Description : If a car starting from rest reaches a velocity of 18 m s-1 after 6.0 s then its acceleration is A. 1 m s-2 B. 2 m s-2 C. 3 m s-2 D. 4 m s-2
Last Answer : 3 m s-2
Description : Which of the following statements dealing with simple harmonic motion of a mass-spring system is TRUE? w) The acceleration is largest when the oscillating mass is instantaneously at rest. x) The ... of the motion. z) The acceleration is larger when the oscillating mass has its greatest velocity.
Last Answer : ANSWER: W -- THE ACCELERATION IS LARGEST WHEN THE OSCILLATING MASS IS INSTANTANEOUSLY AT REST
Description : The average person passes out at an acceleration of 7g (that is, seven times the gravitational acceleration on Earth). Suppose a car is designed to accelerate at this rate. How much time (in seconds) would be required for the car to accelerate from rest to 56.3 miles per hour?
Last Answer : I think the Fluther policy is not to help students with their homework, but I always hate this kind of problem and it seems to me that the g is just in there to provide some background and to confuse you.
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.
Description : If a spinster staring from rest has acceleration of 5 m s-2 during 1st 2.0 s of race then her velocity after 2 s is A. 20 m s-1 B. 10 m s-1 C. 15 m s-1 D. 5 m s-1
Last Answer : 10 m s-1
Description : If a sled has a constant acceleration of 2 meters per second squared and starts from rest, the distance in meters that it will have covered after 5 seconds is: w) 10 meters x) 20 meters y) 25 meters z) 50 meters
Last Answer : ANSWER: Y -- 25 METERS
Description : When a person stands on a scale in an elevator at rest, the scale reads 800 newtons. When the elevator is allowed to fall freely with acceleration of gravity, the scale reads one of the following. Does the scale read: w) 1600 newtons x) 800 newtons y) 400 newtons z) 0 newtons
Last Answer : ANSWER: Z -- 0 NEWTONS
Description : Boiling range of motor gasoline is an indication of the (A) Case of starting (B) Rate of acceleration (C) Vapour locking tendency (D) All (A), (B) and (C)
Last Answer : (B) Rate of acceleration
Description : A sheet of paper can be pulled out quickly from under a glass of water without spilling the water. This phenomenon illustrates (a) lack of friction between paper and glass (b) newton’s third law of motion (c) inertia (d) acceleration
Last Answer : Ans:(c)
Description : The product of mass and acceleration of flowing liquid is called (A) Inertia force (B) Viscous force (C) Gravity force (D) Pressure force
Last Answer : Answer: Option A
Description : Nichrome wire is used in an electric heater because _______. (1) It has high resistance (2) It has high melting point (3) It can resist a current upto approx 5 amperes (4) For all of the above reasons
Last Answer : (4) For all of the above reasons
Description : A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly (A) 38 m (B) 62.5 m (C) 96 m (D) 124 m
Last Answer : (B) 62.5 m
Description : While dusting a carpet, we give a sudden jerk or beat it with a stick because _____. A. Inertia of rest keeps the dust in its position and the dirt is removed by the movement of carpet away B. ... the force of adhesion between the dust and the carpet and the dust is removed D. None of the these
Last Answer : ANSWER: B
Description : As the train starts moving, a man sitting inside leans backwards because of (a) Inertia of rest (b) Inertia of motion (c) Moment of inertia (d) Conservation of mass
Last Answer : Ans:(a)
Description : The primary function of the feathers in birds is to A. Provide insulation for preserving body heat B. Provide striking surface to the wings for flying C. Make the body surface waterproof D. Impart colouration for species as well as sex recognition
Description : The primary function of the feathers in birds is to -----? A. Provide insulation for preserving body heat B. Provide striking surface to the wings for flying (Answer) C. Make the body surface waterproof D. impart coloration for species as well as sex recognition
Last Answer : B. Provide striking surface to the wings for flying (Answer)
Description : The moment of inertia of a body does not depend upon its – (1) axis of rotation (2) angular velocity (3) form of mass (4) distribution of mass
Last Answer : (2) angular velocity Explanation: Moment of inertia is the mass property of a rigid body that determines the torque needed for a desired angular acceleration about an axis of rotation. Moment of inertia ... of moments of inertia of the masses making up the whole object, under the same conditions.
Description : The moment of inertia of a body does not depend upon its (1) axis of rotation (2) angular velocity (3) form of mass (4) distribution of mass
Last Answer : angular velocity
Description : In linear motion, the energy is given by 1⁄2mv2. Similarly, in rotational motion, the rotational energy is given by A. 1/2 I ω; where I: moment of inertia of the body, ω: angular velocity B. 1/ ... angular velocity D. 1/2 I² ω²; where I: moment of inertia of the body, ω: angular velocity
Last Answer : 1/2 × I × ω²; where I: moment of inertia of the body, ω: angular velocity
Description : Total angular momentum of a body is given by A. I ω; where I: moment of inertia of the body, ω: angular velocity B. I² ω; where I: moment of inertia of the body, ω: angular velocity C. I² ... the body, ω: angular velocity D. I ω²; where I: moment of inertia of the body, ω: angular velocity
Last Answer : I × ω; where I: moment of inertia of the body, ω: angular velocity
Description : The number of revolutions through which a pulley will rotate from rest if its angular acceleration is increased uniformly from zero to 12 rad per sec2 during 4 sec and then uniformly decreased to 0 rad per sec2 during the next 3 sec would be a.46.4 b.26.74 c.11.6 d.3.2 e.17.7
Last Answer : b. 26.74
Description : A particle starts from rest and moves in a straight line whose equation of motion is given by S = 2t3 - t2 - 1. The acceleration of the particle after one sec will be a.6 m/sec2 b.4 m/sec2 c.12 m/sec2 d.10 m/sec2 e.8 m/sec2
Last Answer : d. 10 m/sec2
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
Description : What is the total acceleration of a point on the rim of a flywheel 4 mts in diameter 0.6 see after it has started from rest if it accelarates uniformly from rest to 2000 rpm in 20 secs. a.68.9 mts/sec2 b.102.6 mts/sec2 c.78.94 mts/sec2 d.107 dynes e.33.2 mts/sec2
Last Answer : c. 78.94 mts/sec2
Description : A wheel accelerates from rest with an acceleration of 6 rad/sec2. How many revolutions are experienced in 4 seconds? a.12.36 b.25.6 c.9.82 d.107 dynes e.7.64
Last Answer : e. 7.64
Description : A particle experiences constant acceleration for 20 seconds after starting from rest. If it travels a distance D1 in the first 10 seconds and distance D2 in the next 10 seconds then, (a) D2 = D1 (b) D2 = 2D1 (c) D2 = 3D1 (d) D2 = 4D1 -Science
Last Answer : (c) is the answer
Description : A car starts from rest and moves with constant acceleration. In first t seconds it covers distance x. Then distance covered by it in next t seconds wi
Last Answer : A car starts from rest and moves with constant acceleration. In first t seconds it covers distance x. Then distance covered ... x B. 2 x C. 3 x D. 4 x
Description : An aeroplane has a run of 500 m to take off from the runway. It starts from rest and moves with constant acceleration
Last Answer : An aeroplane has a run of 500 m to take off from the runway. It starts from rest and moves with ... is the velocity of the aeroplane at the take off ?
Description : When a proton is released from rest in a room, it starts with an initial acceleration `a_(0)` towards west. When it is projected towards north with a
Last Answer : When a proton is released from rest in a room, it starts with an initial acceleration `a_(0)` towards west. ... e) "east"(3ma_(0))/(ev_(0))"down"`
Description : A car starts from rest and moves on a straight road with a uniform acceleration of 10 m/s2 for the first 10 s. During the next 10 s, the car move s with the velocity it has attained. What is the total distance covered by the car in 20 s? (a) 500 m (b) 1000 m (c) 1,500 m (d) 2,000 m
Description : The Modulus of Elasticity for a material refers to: w) the ability of a material to resist corrosion x) the ratio of stress over strain y) the maximum load over the cross sectional area z) none of the above
Last Answer : ANSWER: X -- THE RATIO OF STRESS OVER STRAIN
Description : Which of the following is not a vector quantity? (1) Acceleration (2) Electric current (3) Force (4) Velocity
Last Answer : (2) Electric current Explanation: For a physical quantity to be termed a vector quantity, having magnitude and direction is not enough.
Description : The reactivity of an ionic compound element is explained as its tendency to attain noble gas configuration. How do the elements do so? (1) Lose electrons (2) Gain electrons (3) Both are correct (4) Both are incorrect
Last Answer : (3) Both are correct Explanation: The reactivity of elements is explained as their tendency to attain a completely filled outer shell. This is called as having attained noble gas configuration. Once noble gas configuration is reached, the elements lose their reactivity.