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qUESTIONS

Two blocks A and B of masses 2m and m, respectively, are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in the figure. The magnitudes of acceleration of A and B, immediately after the string is cut, are respectively

The pulleys and strings shown in the figure are smooth and of negligible mass. For the system to remain in equilibrium, the angle should be

A string of negligible mass going over a clamped pulley of mass m supports a block of mass M as shown in the figure. The force on the pulley by the clamp is given by

A mass of 10kg is suspended vertically by a rope from the roof. When a horizontal force is applied on the rope at some rope deviated at an angle of 45° at the roof point. If the suspended mass is at equilibrium, the magnitude of the force applied is (g = 10ms 2)

A particle of mass m is moving is a straight line with momentum p. Starting at time t = 0, a force F=kt acts in the same direction on the moving particle during time interval T so that its momentum changes from p to 3p. Here k is a constant. The value of T is

If 10^22 gas molecules each of mass 10^-26 kg collide with a surface (perpendicular to it) elastically per second over an area 1m2 with a speed 10^4 m/s, the pressure exerted by the gas molecules will be of the order of

A man (mass 50 kg) and his son (mass = 20 kg) are standing on a frictionless surface facing each other. The man pushes his son so that he starts moving at a speed of 0.70 ms1 with respect to the man. The speed of the man with respect to the surface is

When a bus suddenly takes a turn, the passengers are thrown outwards because of

A particle is moving with a constant speed along a straight-line path. A force is not required to

A metre scale is moving with uniform velocity. This implies

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