A Firecracker Breaks Up into Several Pieces,one of Which Has

question 41

Multiple Choice

A firecracker breaks up into several pieces,one of which has a mass of 200 g and flies off along the x-axis with a speed of 82.0 m/s.A second piece has a mass of 300 g and flies off along the y-axis with a speed of 45.0 m/s.What are the magnitude and direction of the total momentum of these two pieces?

• A) 361 kg • m/s at 56.3° from the x-axis
• B) 93.5 kg • m/s at 28.8° from the x-axis
• C) 21.2 kg • m/s at 39.5° from the x-axis
• D) 361 kg • m/s at 0.983° from the x-axis
• E) 21.2 kg • m/s at 56.3° from the x-axis

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Definitions:

Rate of Return

The net gain or loss on an investment over a specified time period, expressed as a percentage of the investment's initial cost.

Short 1,000 Shares

The act of selling 1,000 shares of a stock that the seller does not own, with the expectation of buying them back at a lower price for a profit.

Repurchase

The act of a company buying back its own shares from the marketplace, which can affect the stock price and shareholder equity.

Initial Margin

The upfront collateral required to open a position in the futures or derivatives market.