Newton's 1st Law of Motion Review Warm-Up

What is Newton's First Law of Motion also known as? The Law of

• Friction
• Mass
• Inertia
• Gravity

What is inertia?

• the force that opposes motion
• the force of attraction between 2 objects
• an object's tendency to stay in motion or to stay at rest
• a change in an object's speed and/or direction

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Objects will keep on doing what they are doing if ____.

• unbalanced forces are acting on them.

• balanced forces are acting on them.

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A dog slides to a stop in the presence of friction. The forces acting on the dog are _____.

• balanced

• not balanced

A bike is traveling at a constant speed in the presence of friction. The forces acting on the bike are _____.

• balanced

• unbalanced

The combined forces acting on an object are called:

• combined motion

• nuclear forces

• net force

• balanced force

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The more mass an object has:

• the higher its inertia (harder to move)

• the lower its inertia (easier to move)

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What happened to the man and his bike once he hit the block?

• The bike stopped, but the man flew forward due to inertia.

• The bike kept going, so he flew forward due to interia.

• The man stopped, but the bike kept going.

• The man and bike both stopped.

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If the man on the right is pushing 50N to the left, and the man on the left is pushing 40 N to the right, then what is the net force?

• 10 N to the left

• 10 N to the right

• 90 N to the left

• 90 N to the right

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