When ball having a projectile motion is rising up, it

A. decelerates

B. accelerates

C. rises up with constant acceleration

D. acceleration becomes zero

1 Answer

Answer :

decelerates


Related questions

Description : When the total product rises at an increasing rate, the - (1) marginal product is zero (2) marginal product is rising (3) marginal product is falling (4) marginal product remains constant

Last Answer : (2) marginal product is rising Explanation: Marginal product of an input (factor of production) is the extra output that can be produced by using one more unit of the input (for instance ... from total product. The other is average product. Marginal product is directly proportional to total product.

Description : When the total product rises at an increasing rate, the (1) marginal product is zero (2) marginal product is rising (3) marginal product is falling (4) marginal product remains constant

Last Answer : marginal product is rising

Description : During the motion of a projectile fired from the earth surface, ______. (1) its kinetic energy remains constant (2) its momentum remains constant (3) vertical component of its velocity remains constant (4) horizontal component of its velocity remains constant

Last Answer : (4) horizontal component of its velocity remains constant Explanation: The motion of a projectile is a two-dimensional motion-Horizontal motion and vertical motion-that take place independent ... continuously affects the vertical component, so the vertical motion is a uniformly accelerated motion.

Description : During the motion of a projectile fired from the earth surface, _______ (1) its kinetic energy remains constant (2) its momentum remains constant (3) vertical component of its velocity remains constant (4) horizontal component of its velocity remains constant

Last Answer : horizontal component of its velocity remains constant

Description : A particle is moving in a uniform circular motion with constant speed v along a circle of radius r. The acceleration-of the particle is – (1) zero (2) V/r (3) V/r² (4) V²/r

Last Answer : (4) V²/r Explanation: When a particle is moving in a uniform circular motion with constant speed and radius. the acceleration of the particle is given by v2/r. The particle will exhibit centripetal acceleration.

Description : A body which is attached to a spring undergoes simple harmonic motion. The magnitude of the body's acceleration is: w) constant x) proportional to its displacement from its equilibrium position y) zero z) always increasing.

Last Answer : ANSWER: X -- PROPORTIONAL TO ITS DISPLACEMENT FROM ITS EQUILIBRIUM POSITION 

Description : A car is moving along a straight horizontal road at a speed of 20 meters per second. The brakes are applied and a constant force of 5000 Newtons decelerates the car to a stop in 10 seconds. The mass of the car is: w) 1250 kilograms x) 2500 kilograms y) 5000 kilograms z) 10,000 kilograms

Last Answer : ANSWER: X -- 2500 KILOGRAMS

Description : As the ball falls towards the ground, its velocity A. increases B. decreases C. remains constant D. becomes zero

Last Answer :  increases

Description : The resultant motion of two Simple Harmonic Motions will be A. Simple Harmonic MotionB. Periodic Motion C. Projectile Motion D. Zero

Last Answer : A. Simple Harmonic Motion

Description : A car accelerates from rest at a constant rate of `2 m//s^(2)` and comes to rest. If it remains in motion for 3 seconds, then the maximum speed attain

Last Answer : A car accelerates from rest at a constant rate of `2 m//s^(2)` and comes to rest. If it remains in motion for 3 ... s B. 3 m/s C. 4 m/s D. 6 m/s

Description : What are the two kinds of Rotatory motion? (1) Spin and Vibrational motion (2) Spin and Orbital motion (3) Spin and Translatory motion (4) Spin and Projectile motion

Last Answer : (2) Spin and Orbital motion Explanation: The motion of an object is said to be rotatory if the particles of the object rotate in a circular path with respect to an imaginary axis, known as the axis of rotation.

Description : What are the two kinds of Rotatory motion? (1) Spin and Vibrational motion (2) Spin and Orbital motion (3) Spin and Translatory motion (4) Spin and Projectile motion

Last Answer : (2) Spin and Orbital motion Explanation: Rotary motion (angular motion) of a body can take place about an axis that passes through the body or about an axis that does not pass through the body.

Description : A player making a long jump is an example of ______. (1) Projectile motion (2) Rotatory motion (3) Spinning motion (4) Horizontal motion

Last Answer : (1) Projectile motion Explanation: Projectile motion is a form of motion in which an object or particle is thrown near the earth's surface and it moves along a curved path under the action of gravity only.

Description : A ball is thrown horizontally from the top of a cliff. Assuming no air resistance, the acceleration of the ball while it is in flight is: w) in the vertical direction only x) in the horizontal direction only y) in the vertical and horizontal directions z) zero.

Last Answer : ANSWER: W -- IN THE VERTICAL DIRECTION ONLY

Description : For an object moving in uniform circular motion, the direction of the instantaneous acceleration vector is: w) tangent to the path of motion x) equal to zero y) directed radially outward z) directed radially inward

Last Answer : ANSWER: Z -- DIRECTED RADIALLY INWARD

Description : If a car is traveling at 20 meters per second in a straight line, how many seconds will it take the car to stop if it decelerates at 5 meters per second squared?

Last Answer : ANSWER: 4 SECONDS

Description : In simple harmonic motion, the acceleration is: w) constant x) proportional to the distance from the central position y) greatest when the velocity is greatest z) none of the above

Last Answer : ANSWER: X -- PROPORTIONAL TO THE DISTANCE FROM THE CENTRAL POSITION

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 : Absolute Zero is defined as – (1) The temperature at which all molecular motion ceases (2) At which water boils at 298K (3) At which liquid Helium boils (4) At which the volume becomes zero

Last Answer : (1) The temperature at which all molecular motion ceases Explanation: Absolute zero is the temperature at which all motion in matter stops and is thought to be unreachable. It is ... nature have minimal vibrational motion, retaining only quantum mechanical, zero-point energy-induced particle motion.

Description : Absolute Zero is defined as (1) The temperature at which all molecular motion ceases (2) At which water boils at 298K (3) At which liquid Helium boils (4) At which the volume becomes zero

Last Answer : The temperature at which all molecular motion ceases

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 train accelerates from 36 km/h to 54 km/h in 10 sec. (i) Acceleration (ii) The distance travelled by car. -Science

Last Answer : a. Acceleration is given by a=ΔvΔta=ΔvΔt Δv=54−36=18km/hr=18×10003600m/s=5m/sΔv=54−36=18km/hr=18×10003600m/s=5m/s So a=.5 m/s2 b. Distance is given by S=ut+12at2S=ut+12at2 Now u=36 km/hr =10m/s s=10×10+12×.5×102s=10×10+12×.5×102 So s=125m

Description : After a projectile is fired horizontally near the earth's surface, the horizontal component of its velocity, neglecting any air resistance: w) increases steadily x) decreases steadily y) first decreases, then increases z) remains constant

Last Answer : ANSWER: Z -- REMAINS CONSTANT 

Description : An object covers distance which is directly proportional to the square of the time. Its acceleration is – (1) increasing (2) decreasing (3) zero (4) constant

Last Answer : (4) constant Explanation: When an object covers distance which is directly proportional to the square of the time, its acceleration is constant. This is seen in the cases of falling objects. This connection between time and distance was first observed by Galileo.

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.

Description : If there is no net force acting on body, then its acceleration is A. zero B. constant C. increasing D. decreasing

Last Answer :  zero

Description : If we get a straight line with positive slope then its acceleration is A. increasing B. decreasing C. zero D. constant

Last Answer : constant

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

Last Answer : ANSWER: Y -- ALWAYS ZERO 

Description : A satellite travels at a constant speed in a circular orbit. The acceleration of the satellite is w) zero x) toward the center of the orbit y) away from the center of the orbit z) at a tangent to the orbit

Last Answer : ANSWER: X -- TOWARD THE CENTER OF THE ORBIT

Description : Which of the following is not a projectile? a.Bullet coming out of a revolver b.Arrow released from a bow c.Lifting of a balloon d.Throwing a cricket ball from one player to another e.None of the above

Last Answer : d. Throwing a cricket ball from one player to another

Description : Which of the following is an example of a projectile? a.Launching of a satellite b.Taking off of an aircraft c.Lifting of a balloon d.Throwing of a cricket ball by a player e.None of the above

Last Answer : d. Throwing of a cricket ball by a player

Description : Japan is called the Land of the rising sun' because - (1) Sun rises there as soon as it sets (2) Sun always remains in the eastern part of the sky throughout the day in Japan (3) Japan being ... (4) The rays of the sun get reflected from the waters of the sea and make the sunrise beautiful in Japan

Last Answer : (3) Japan being the Eastern most country in the world, it has the earliest sunrise Explanation: Japan is an archipelago, or a group of islands, about 100 miles east of the Asian main land in the Far East. ... the others get the rays if the sun. That's why Japan is called the land of the rising sun.

Description : Japan is called ‘Land of the rising sun’ because: A. Sun rises there as soon as it sets B. Sun always remains in the eastern past of the sky throughout the day in Japan C. Japan being the Eastern most country in the world, it has the earliest sunrise (Answer)

Last Answer : C. Japan being the Eastern most country in the world, it has the earliest sunrise (Answer)

Description : Japan is called the Land of the rising sun' because (1) Sun rises there as soon as it sets (2) Sun always remains in the eastern part of the sky throughout the day in Japan (3) Japan being ... 4) The rays of the sun get reflected from the waters of the sea and make the sunrise beautiful in Japan

Last Answer : Japan being the Eastern most country in the world, it has the earliest sunrise

Description : What is the only reguriment for an object to be in projectile motion?

Last Answer : Feel Free to Answer

Description : How does air resistance affect the components of projectile motion?

Last Answer : Feel Free to Answer

Description : What do vertical component of the projectile motion of an object depend on?

Last Answer : Both of these

Description : Which are examples of projectile motion ?

Last Answer : A javelin flying trough the air.A tennis ball lobbed over the net.

Description : Two dimensional motion is not always projectile motion . in two -dimensional motion that is not projectile motion , ____ is not accelerating the objective?

Last Answer : Gravity

Description : Froude number is significant in (A) Supersonics, as with projectile and jet propulsion (B) Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. (C) Simultaneous motion ... gravity forces, and wave making effect, as with ship's hulls (D) All of the above

Last Answer : Answer: Option C

Description : Reynolds number is significant in (A) Supersonics, as with projectile and jet propulsion (B) Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. (C) Simultaneous motion ... gravity forces, and wave making effect, as with ship's hulls (D) All of the above

Last Answer : Answer: Option B

Description : When water freezes its density – (1) Decreases (2) Becomes Zero (3) Remains constant (4) Increases

Last Answer : (1) Decreases Explanation: Water at ordinary temperatures contracts and in-creases in density as it is cooled, like most substances. But at about 4°C it reaches a maximum density and then decreases in density as it approaches the freezing point. This is referred to as anomalous property of water.

Description : Object is in equilibrium if resultant force acting on it is A. increasing B. decreasing C. zero D. becomes constant

Last Answer : zero

Description : By increasing the current, the drift velocity A. decreases B. increases C. remains constant D. becomes zero

Last Answer : remains constant

Description : When water freezes its density (1) Decreases (2) Becomes Zero (3) Remains constant (4) Increases

Last Answer : Decreases

Description : When a megohmmeter is being used to test insulation resistance, current leakage along the surface of the insulation is indicated by the megohmmeter pointer _____________. A. fluctuating around a ... slightly downscale as voltage is applied D. continually rising as the test voltage is applied

Last Answer : Answer: C

Description : When a megohmmeter is being used to test insulation resistance, current leakage along the surface of the insulation is indicated by the megohmmeter's pointer _____________. A. dipping toward ... kicking slightly down scale as voltage is applied D. fluctuating around a constant resistance reading

Last Answer : Answer: C

Description : a particle moves with uniform velocity. Which o fthe following statements about the motion of the particle is true. (a) its speed is zero. (b) its acceleration is zero. © its acceleration is opposite to the velocity. (d) its speed may be variable

Last Answer : Its acceleration is zero

Description : What type of lens decelerates a portion of a spherical wavefront

Last Answer : Delay lens

Description : In our present society, where values are deteriorating, the excellent education will be which (a) Enables one to earn in an easy manner (b) Exaggerates the competition in the society. (c) Works for re-establishment of human and cultural values. (d) Decelerates the social-change in the society

Last Answer : c) Works for re-establishment of human and cultural values.