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 bus is moving with a speed of 10 ms⁻¹ on a straight road. A scooterist wishes to overtake the bus in 100 s. If the bus is at a distance of 1 km from […]
A projectile is fired at an angle of 45° with the horizontal. Elevation angle of the projectile at its highest point as seen from the point of projection is
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(a) 60° (b) […]
A particle moves in a straight line with a constant acceleration. It changes its velocity from 10 ms⁻¹ to 20 ms⁻¹ while passing through a distance 135m in t second. The value of t is: […]
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