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A particle is moved in a semi-circular path of radius R. Then

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Important Questions on Kinematics

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An object is thrown vertically with a velocity u. The velocity with which it strikes the ground on its return is
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A ship of mass 2×107kg initially at rest is pulled by a force of 5×105N, through a distance of 2m. Assuming that the resistance due to water is negligible, the speed of the ship is
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A bat emits an ultrasonic sound wave at 33.0 kHz and receives an echo 0.1 s later. What is the distance of the bat from the object-producing echo ? (Speed of sound in air is 330 m/s )
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The magnitude of deceleration required for a body, moving at a speed of 10 m/s to come to a complete halt at a distance of 100 m is
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The variation of speed (in m/s) of an object with time (in seconds) is given by the expression V(t)=V0-5t+5t2
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An object having a velocity 5 m/s is accelerated at the rate 2 m/s2 for 6 s. Find the distance travelled during the period of acceleration
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A particle is moving along with X -axis such that its acceleration is proportional to the displacement from the equilibrium position and they are in the same direction. The displacement xt is given by (where ω>0 is a constant)
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The following plot gives the variation of acceleration m/s2 with time (s) for an object that started from rest at time t=0 s. The velocity at time t=15 sv15 and at 25 s V25, respectively are

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