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qUESTIONS

A block of mass m is placed on a smooth inclined wedge ABC of inclination 0 as shown in the figure. The wedge is given an acceleration ‘a’ towards the right. The relation between a and 0 for the block to remain stationary on wedge is

A particle moving with velocity V is acted by the three forces shown by the vector triangle PQR. The velocity of the particle will

A person is standing in an elevator. In which situation he finds his weight less than actual weight

A person used force (F), shown in figure to move a load with constant velocity on given surface

A man is standing at a spring platform. Reading of spring balance is 60 kgwt. If man jumps outside platform, then reading of spring balance

A body, whose momentum is constant, must have constant

A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m while applying the force and the ball goes upto 2 m height further, find the magnitude of the force.

A player caught a cricket ball of mass 150 gm moving at the rate of 20 m/sec. If the catching process be completed in 0.1sec the force of the blow exerted by the ball on the hands of player is

Two fixed frictionless inclined planes making an angle 30° and 60° with the vertical are shown in the figure. Two blocks A and B are placed on the two planes. What is the relative vertical acceleration of A with respect to B

Two particles of mass m each are tied at the ends of a light string of length 2a. The whole system is kept on a frictionless horizontal surface with the string held tight so that each mass is at a distance ‘a’ from the center P (as shown in the figure). Now, the mid-point of the string is pulled vertically upwards with a small but constant force F. As a result, the particles move towards each other on the surface. The magnitude of acceleration, when the separation between them becomes 2x, is

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