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2020-05-10 12:02:37
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candle academy pakistan
Problem no 19
A bullet was fired horizontally with 200 m/s from the top of a building 20m high. When the bullet was 10 m above the ground, incidentally it hits a bird. Find the time taken to hit the bird and the velocity of the bullet when it hits the bird.
Problem no 20
A player throws a ball at an initial velocity of 36 m/s. Calculate the maximum distance reached by the ball, assuming the ball is caught at the same height at which it was released. If he wishes to throw the ball half the maximum distance in the shortest possible time, compute the angle of elevation.
Problem no 21
Calculate centripetal acceleration and centripetal force on a man whose mass is 80 kg and who is resting on the ground at the equator. Given that the radius of the earth is 6.4 x 10^6 m and the earth completes one rotation in one day.
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