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I

I need to verify my work about this problem:

Two small objects A and B are suspended from the ends of a rope thrown over a pulley. Object A is at 1.2 m above B when the system is at rest. Object A descends with a downward acceleration of 0.3m/s^{2}and because of the rope, B accelerates upward at the same rate. How much time elapses before the objects bump each other?

I found t=2seconds

II

A softball picher pitches a ball at 65 mph.

The distance from the pitcher's mound to home plate is 43ft, but the pitcher realeases the ball about 41 ft from the home plate.

a- How long does it takes for the ball to reach home plate? (I found it t=.43s)

b-A Good pitcher can make the ball curve left about 6 inches over the pitch distance. If this is due to a constant acceleration, what is its magnitude and which direction does it act?

For this second question I do not know how to do it.

need some suggestions

Thank you

brad

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# Homework Help: 2 questions

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