A Girl of Mass 55 Kg Throws a Ball of Mass

question 14

Multiple Choice

A girl of mass 55 kg throws a ball of mass 0.8 kg against a wall.The ball strikes the wall horizontally with a speed of 25 m/s,and it bounces back with this same speed.The ball is in contact with the wall 0.05 s.What is the average force exerted on the wall by the ball?

• A)800 N
• B)400 N
• C)55,000 N
• D)27,500 N
• E)13,750 N

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Definitions:

Preferred Stock

A category of equity in a company that ranks above common stock in terms of claims on assets and profits, typically involving stable dividend payments.

Breakpoint

A volume discount in the sales charge or load of a mutual fund, offered to investors when investments exceed a specific dollar amount.

Capital

Funds or assets that are used for investing in business operations to generate profitable returns.

WACC

Stands for Weighted Average Cost of Capital, a calculation of a firm's capital cost that weights each category of capital proportionately.