Understanding Gravitational Forces

There is a gravitational force between you and your desk. This gravitational force is very small because:

• The masses are tiny compared to Earth's mass

• It doesn’t need to be large

• The distance between the objects is small

• It is a noncontact force

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Mass and weight are different. Mass depends on ____. Weight depends on ____.

• Gravitational force, the amount of matter

• Placement, force

• Force, placement

• The amount of matter, gravitational force

Which of the following is most closely related to gravity?

• Distance

• Mass

• Weight

• Speed

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If the mass of one of two spheres increases, how does it affect the gravity between the two spheres?

• The gravity increases

• The gravity decreases

• The gravity fluctuates

• The gravity is not affected

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Gravity is an example of which kind of force?

• Contact

• Noncontact

• Speed

• Direction

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Gravitational force differs based on two things. It increases with increasing ____. It decreases with increasing ____.

• Mass

• Distance

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Describe the difference between contact and noncontact forces.

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An object’s weight is ____ its mass.

• Equal to

• Less than

• Proportional to

• Not related to

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A planet is discovered that has twice the mass of Earth but the same gravitational acceleration. If you weigh 700 N on Earth, on the new planet you would weigh:

• 350 N

• 700 N

• 1,400 N

• 2,800 N

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Mass varies depending on where the object is located.

• True

• False