Gravitational Forces

When placed at equal distances apart, the greatest gravitational attraction will be between two

• skateboards

• bowling balls

• school buses

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Which is needed to determine the amount of gravitational force between two objects?

• distance and mass

• weight and time

• area and weight

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The gravitational force exerted by an object depends on its

• volume

• mass

• weight

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NGSS.MS-PS2-4

A student drops a bowling ball and an apple from a third-story window. Both objects hit the ground at the same time. From the experiment, the student should conclude that

• the apple weighs more than the bowling ball

• more air friction is acting on the apple than on the bowling ball

• gravity pulls on both objects, causing them to fall at the same time.

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NGSS.MS-PS2-4

The force of gravity is related to the masses of objects attracting each other. Which planet has the greatest mass?

• Mercury 3.7

• Jupiter 23.1

• Neptune 11.0

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What is gravitational force?

• It makes objects at rest start moving.
• It makes objects that are moving stop.
• The force of attraction between two objects.
• It pulls you into space.

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A baseball and bat are on the ground.   What is true?

• They attract each other with equal gravitational force.
• There is no gravitational force between them.
• The baseball will float because it's lighter.
• The bat will pull the baseball closer to itself.

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As the product of two objects' masses increases, the pull of gravity

• Increases
• Decreases
• Stays the same

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NGSS.MS-PS2-4

If a feather and a hammer are dropped at the same time on the moon, where there is no atmosphere, which one will hit the ground first?

• Neither, there is no gravity on the moon.
• hammer because it has more mass
• feather because it has less mass
• both will hit at the same time

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NGSS.MS-ESS1-2

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This FORCE pulls things.  It PULLS things into orbit around the sun. 

• Newton
• gravity
• weight
• path

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