A Hockey Puck with a Mass of 160 G Slides

question 46

Multiple Choice

A hockey puck with a mass of 160 g slides at a speed of 12 m/s on frictionless ice.The puck runs into a small box with a mass of 850 g that is initially at rest.Assuming that the collision is elastic,what is the speed of the box after the collision?

• A)2.3 m/s
• B)3.8 m/s
• C)5.6 m/s
• D)6.0 m/s
• E)8.2 m/s

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Definitions:

Lens Flattens

A process where the lens of the eye changes shape, becoming less curved, to focus distant objects clearly onto the retina.

Ciliary Muscles

Ring-shaped muscles located in the eye that control the shape of the lens to focus on objects at varying distances.

Pupil Diameter

The size of the opening in the center of the iris of the eye, which varies to regulate the amount of light reaching the retina.

Hyperpolarizing

Pertains to the increase in a cell's membrane potential, making it more negative.