A 0140-Kg Baseball Is Dropped and Reaches a Speed of 1

question 62

Multiple Choice

A 0.140-kg baseball is dropped and reaches a speed of 1.20 m/s just before it hits the ground and bounces.It rebounds with an upward velocity of 1.00 m/s.What is the change of the ball's momentum during the bounce?

• A)0.0280 kg ∙ m/s upwards
• B)0.0280 kg ∙ m/s downwards
• C)0.308 kg ∙ m/s upwards
• D)0.308 kg ∙ m/s downwards
• E)0.000 kg ∙ m/s

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Definitions:

Altruistic Motives

Reasons behind actions that are primarily concerned with the welfare or benefit of others, without personal gain.

Reciprocity

A social norm of responding to a positive action with another positive action, rewarding kind actions.

Empathy

An emotional response to others as if we ourselves were in that person’s situation; feeling pleasure at another’s pleasure or pain at another’s pain.

Responsible

The state or quality of being accountable or to blame for something, often involving obligations to act ethically and sensibly.