Momentum: a Firecracker Breaks Up into Several Pieces, One of Which

question 44

Multiple Choice

Momentum: 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

Determine the effect of percentage changes on values.

Convert mixed numbers to decimals and percentages.

Evaluate mathematical expressions accurately.

Perform accurate arithmetic operations involving powers and roots.

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