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Q. A 280-g block on a 52 cm long string swings in a circle on a horizontal, frictionless table at 95 rpm. What is the speed of the block?

Q. A 3.40-kg steel ball strikes a wall with a speed of 7-m/s at an angle of 60° with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for 0.200-s, what is the average force exerted by the wall on ball?

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Category:- Physics
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