You are marooned on a frictionless horizontal plane and cannot exert any horizontal force by pushing against the surface.How can you get off
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(a) by jumping (b) by rolling your body on […]
A body with mass 5 kg is acted upon a force F=(-3i+4j) N.If its initial velocity at t=0 is v=(6i-12j)m/s.The time at which it will just have a velocity along the y-axis is
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A block is moving up an inclined plane of inclination 60° with velocity of 20 ms⁻¹ and stops after 2.00s. If g=10 ms⁻², then the approximate value of coefficient of friction is
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A heavy uniform chain lies on a horizontal top table.If the coefficient of friction between the chain and the table is 0.25,then the maximum percentage of the length of the chain that can hang over […]
A block of mass 4 kg is kept on a rough horizontal surface.The coefficient of static friction is 0.8.If a force of 19 N is applied on the block parallel to the floor, then the […]
A spring balance is attched to the ceiling of lift.A man hangs his bag on the string and the balance reads 49 N,when the lift is stationary.If the lift moves downwards with an acceleration of […]
The ratio of the weight of a man in a stationary lift and when it is moving downwards with uniform acceleration a is 3:2,then the value of a is
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(a) 3/2 g (b) […]
A ship of mass 3 x 10⁷ kg initially at rest is pulled by a force of 5 x 10⁴ N through a distance of 3m. Assume that the resistance due to water is negligible,the […]
A spring balance is attached to the ceiling of a lift.A man hangs his bag on the spring and the spring reads 49 N, when the lift is stationary. If the lift moves downward with […]
A car wheel is rotated to uniform angular acceleration about its axis .Initially its angular velocity is zero. It rotates through an angle θ₁ in the first 2s, in the next 2s,it rotates through an […]
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