12 Test Review

Match the following

• 1st Law

• Forces act in pairs

• Newtons

• F = ma

• gravity

• Satellites orbit due to this

• 3rd Law

• Law of inertia

• 2nd Law

• Force is measured in this unit

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First Law of Motion ​ (a)   ​ (b)   ​ (c)   ​ (d)  

• an object at rest stays at rest
• an object in motion stays in motion
• law of inertia
• force = mass X acceleration
• forces act in pairs
• Why we use seatbelts

Match the following

• acceleration

• Greatest force on Earth

• free fall

• Property of all moving objects;

  p = mv

• gravity

• Change in velocity

• force

• A push or pull on an object

• momentum

• Motion when only gravity is acting on an object

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What is mass? ​ (a)   ​ (b)  

• the amount of matter in an object
• never changes
• measure of gravitational force on an object
• Can change due to location

Newton's first law of motion applies to:

• moving objects

• nonmoving objects

• all objects

• no objects

When gravity and air resistance (friction) are the same it is called?

• acceleration

• gravity

• free fall

• terminal velocity

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Air bags and car seats are necessary because of passengers?

• weight

• inertia

• acceleration

• momentum

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Any change in an objects velocity is caused by?

• its mass

• a balanced force

• unbalanced force

• none of these

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The curved path an object follows when thrown or launched near the surface of the Earth is called?

• projectile motion

• gravity

• free fall

• orbit

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Gravity ____________ between two objects the larger their masses are.

• increases

• decreases

• stays the same

• accelerates

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