Gravity & Inertia

What is the best definition of gravity?

• a property of matter that makes items move

• a natural force of attraction exerted by a celestial body on objects that are on or near its surface

• an object that makes other objects fall

• a property of force that continues to keep objects in motion

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Larger masses have a

• weaker gravitational force

• stronger gravitational force

• equal gravitational force

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Holds the Earth and other planets in orbit around the Sun.

• The Sun's gravitational force

• The moon's gravitational force

• The Earth's gravitational force

• The lack of gravitational force

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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 

Objects with greater _________ also have greater inertia.

• speed
• mass
• temperature
• friction

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What two forces affect gravity?

• mass and inertia

• mass and distance

• mass and force

• mass and weight

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What forces cause a planet to orbit?

• gravity and orbit
• gravity and inertia
• gravity and mass
• gravity and weight

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What would happen to the planets in the solar system if the sun’s gravitational force were to suddenly disappear?

• They will stop moving and become static.
• They will stop spinning.
• They will fly away in straight lines.
• They will start moving toward the Sun

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As distance between objects increases, the pull of gravity...

• increases

• decreases

• Stays the same

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