A 010-Kg Ball,traveling Horizontally at 25 M/s,strikes a Wall and Rebounds

question 28

Multiple Choice

A 0.10-kg ball,traveling horizontally at 25 m/s,strikes a wall and rebounds at 19 m/s.What is the magnitude of the change in the momentum of the ball during the rebound?

• A)1.2 kg ∙ m/s
• B)1.8 kg ∙ m/s
• C)4.4 kg ∙ m/s
• D)5.4 kg ∙ m/s
• E)72 kg ∙ m/s

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Definitions:

Maintenance Margin

The minimum amount of equity that must be maintained in a margin account after a purchase has been made, to continue holding the position.

Initial Margin

The percentage of the purchase price of securities (that can be bought on margin) that the investor must pay with his/her own cash or marginal securities.

Federal Reserve System

The central banking system of the United States, responsible for monetary policy, regulating banks, and ensuring financial system stability.