PHYSICS 205-TEST 2 ch 4 Wed., Nov.15, 2017 NAME 1. A baseball with mass m and ve

Question

PHYSICS 205-TEST 2 ch 4 Wed., Nov.15, 2017 NAME 1. A baseball with mass m and velocity v strikes a catcher's mitt. The mitt moves through a distance What force did the ball apply to the glove? 2. When an m-kg bird lands midway on a light telephone wire between two poles, a distance d apart, the wire sags s meters. How much tension does the bird produce in the wire? 3. An m-kg piece of wood is sandwiched between two other boards and held in place by a clamp. The coefficient of friction between the boards is . What must be the minimum force by the clamp on each of the two outer boards if the middle board is not to slip out when held vertically? 4. A diver of mass m jumps from a board d above the water. If his downward motion is stopped t seconds after he enters the water, what average upward force did the water exert on him?

Explanation / Answer

Final velocity =0

V^2 = u^2-2as

Then u^2 = 2as

a = v^2÷2d

Then force = mv^2/2d

As per chegg policies i can solve only one question at a time.

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