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C. R. Daish has written that, for professional golfers, the initial speed of the ball off the clubhead is about 140 mi/h. He also says: (a) "If the Empire State Building could be swung at the ball at the same speed as the clubhead, the initial ball velocity would only be increased by about 2%" and (b) "once the golfer has started his or her downswing, camera clicking, sneezing, and so on can have no effect on the motion of the ball." Can you give qualitative arguments to support these two statements?

C. R. Daish has written that, for professional golfers, the initial speed of the ball off the clubhead is about 140 mi/h. He also says: (a) "If the Empire State Building could be swung at the ball at the same speed as the clubhead, the initial ball velocity would only be increased by about 2%" and (b) "once the golfer has started his or her downswing, camera clicking, sneezing, and so on can have no effect on the motion of the ball." Can you give qualitative arguments to support these two statements?

Grade:10

1 Answers

Jitender Pal
askIITians Faculty 365 Points
6 years ago
(a)
Momentum of a particle is directly proportional to the mass of the particle. Larger is the mass larger will be the momentum. As the Empire State Building has the greater mass than the club head, therefore if the Empire State Building could be swung at the ball at the same speed as the club head, the initial velocity would only be increased by about 2%.
(b)
Momentum of a particle is directly proportional to the mass of the particle and speed of the particle. So the motion of ball depends only mass and speed of the ball. Therefore, once the golfer has started his or her downswing, camera clicking, sneezing, and so on can have no effect on the motion of the ball.

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