Physics-
General
Easy
Question
Two masses 
are suspended together by a massless spring of constant 
. When the masses are in equilibrium, 
is removed without disturbing the system. The amplitude of oscillations is
The correct answer is:
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A mass of 2.0 kg is put on a flat pan attached to a vertical spring fixed on the ground as shown in the figure. The mass of the spring and the pan is negligible. When pressed slightly and released the mass executes slightly and released the mass executes a simple harmonic motion. The spring constant is 
. What should be the minimum amplitude of the motion, so that the mass gets detached from the pan? (Take g=10 
)
A mass of 2.0 kg is put on a flat pan attached to a vertical spring fixed on the ground as shown in the figure. The mass of the spring and the pan is negligible. When pressed slightly and released the mass executes slightly and released the mass executes a simple harmonic motion. The spring constant is . What should be the minimum amplitude of the motion, so that the mass gets detached from the pan? (Take g=10 )
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In an arrangement shown here mass 1 kg lying on a smooth surface is thrown with velocity 8 m/s towards a bob of mass 4 kg initially at rest. After the collision mass 1 kg comes to rest. Find coefficient of restitution and the height to which the bob will rise after the collision. Assuming collision to be head on. 
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A 20 kg block is initially at rest on a horizontal surface for which the coefficient of friction is 0.6. If a horizontal force F is applied such that it varies with time as shown in figure, the speed of the block after 10 s is
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