Gravity and Inertia

What is gravity?

• A resistance to change. 
• A force that attracts and repels objects.
• A force that pulls objects "in" or together.
• A force that causes objects in motion to stay in motion. 

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Gravity attracts all objects towards one another.

• False
• True
• It depends

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Two factors impacting the strength of the force of gravity between 2 objects are...

• mass and distance 
• mass and matter
• distance and weight 
• weight and mass

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NGSS.HS-PS2-4

What is inertia? 

• A force that attracts and repels objects. 
• An object in motion that was to stay in a straight path unless it is acted upon by another force. 
• A force that pulls objects "in" or together. 
• A force that is measured in Newtons. 

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NGSS.HS-PS2-1

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Because of inertia, a moving object will keep ________.

• at rest
• moving
• in one spot
• inertia 

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Because of inertia, a resting object will remain at ________.

• rest
• a constant speed
• school
• inertia 

Which of the following is an example of inertia?

• Slamming on the breaks in your car and flying forward.
• An apple falling off of a tree. 
• Running at a cross country event. 

Anything with ____________ also has a gravitational pull.

• mass

• size

• depth

• light

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A force which tries to pull two objects towards each other is

• gravity

• inertia

• mass

• speed

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Inertia tells us that we need ____________ to get an object moving or to make it stop.

• a force

• gravity

• friction

• strength

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