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A cricket ball of mass 0.5 kg strikes a bat normally with a velocity of 20 m/sec and rebounds with a velocity of 10 m/sec in the opposite direction. What is the impulse of the force exerted by the ball on the bat.

A bullet initially moving with a velocity of 20 m/sec strikes a target and comes to rest after penetrating a distance of 10 cm in the target. Calculate the retardation caused by the target.

A object is initially moving along a straight line with a velocity of 300 metres

per second and accelerates at 10 metres per second squared for 90 seconds. Calculate

(a) the final velocity 

(b) the total distance the object travels.