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Which of the following decreases, in motion on a straight line, with constant retardation?
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Important Questions on Kinematics
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An object dropped in a stationary lift takes time to reach the floor. It takes time when lift is moving up with constant acceleration. Then
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An object travelling at a speed of comes to rest in a distance of after the brakes were applied. The retardation produced by the brakes is
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A ball is projected upwards. Its acceleration at the highest point is
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The displacement of a particle starting from rest at is given by . The time in seconds at which the particle will attain zero velocity is
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A rifle bullet loses of its velocity in passing through a plank. The least number of such planks required just to stop the bullet is
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An object is moving with a uniform acceleration which is parallel to its instantaneous direction of motion. The displacement velocity graph of this object is
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A hiker stands on the edge of a cliff above the ground and throws a stone horizontally with an initial speed of . The speed with which it hits the ground is
