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qUESTIONS

Consider the following statements about the blocks shown in the diagram that are being pushed by a constant force on a frictionless table

An explosion blows a rock into three parts. Two parts go off at right angles to each other. These two are, 1 kg first part moving with a velocity of 12 ms 1 and 2 kg second part moving with a velocity of 8 ms1. If the third part flies off with a velocity of 4 ms1, its mass would be

A rigid ball of mass m strikes a rigid wall at 60° and gets reflected without loss of speed as shown in the figure below. The value of impulse imparted by the wall on the ball will be

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 particle of mass 0.3 kg is subjected to a force F = -kx with k = 15N/m. What will be its initial acceleration if it is released from a point 20 cm away from the origin

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