5.1 Review Part 2

What is this used for in science and engineering?

• A spring is used for storing energy and providing force.
• A spring is used for holding objects together.
• A spring is used for generating electricity.
• A spring is used for measuring temperature.

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What does the force from a spring always act to do?

• Return the spring to its resting shape

• Increase the spring's length permanently

• Making the spring spin

• Make the spring heavier

Which of the following best describes the purpose of a spring in a mechanical system?

• To make or control forces

• To absorb light

• To conduct electricity

• To cool down the system

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Which of these springs is designed to be stretched? Which is designed to be compressed?

• Left spring is for stretching; right spring is for compressing.
• Left spring is for compressing; right spring is for stretching.
• Both springs are for stretching only.
• Both springs are for compressing only.

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What happens when you stretch a spring?

• The spring exerts an opposite force back on your hand.

• The spring exerts a force in the the same direction your hand pulls

• The spring does not react.

• The spring always compresses

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The force created by a spring is proportional to which ratio?

• The ratio of the extended or compressed length divided by the original (resting) length.

• The ratio of the spring’s mass to its length.

• The ratio of the spring’s diameter to its length.

• The ratio of the spring’s diameter to its length.

If you stretch a spring twice as much, what happens to the force it makes?

• The force is twice as much.

• The force stays the same.

• The force is half as much.

• The force disappears.

Explain why the force exerted by a spring increases when the spring is stretched further. Use evidence from the proportional relationship described.

• Because the force is proportional to the ratio of the extended length to the original length, stretching the spring further increases this ratio, resulting in a greater force.

• Because the spring gets heavier as it stretches.

• Because the spring changes color as it stretches.

• Because the spring becomes longer and thinner.

What is the force of gravity on an object called?

• Mass

• Weight

• Volume

• Density

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At Earth's surface, what is the force exerted by gravity on every kilogram of mass?

• 5.6 N

• 9.8 N

• 12.4 N

• 7.2 N