Unit 5: Universal Gravitation Review

Which of the following is Newton's Law on Gravitation?

• F_g = (G·m₁·m₂) / d

• F_g = (G·m₁·m₂) / d²

• F_g = (G·m₁·m₂) / 2d

• F_g = (m₁·m₂) / d²

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NGSS.HS-PS2-4

Two factors effecting the magnitude 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

Force of gravity has a direct relationship with

• the mass of the objects

• the weight of the objects

• the distance between the objects

• the time it takes for the objects to attract

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NGSS.HS-PS2-4

If I double the distance between two objects, what happens to their gravitational Force?

• 4 x F

• $\frac{1}{4}$ x F
  

• $\frac{1}{2}$ x F

• 2 x F

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NGSS.HS-PS2-4

If I double the mass of one object, but don't change anything else, what happens to the gravitational force between the two objects?

• 2 x F

• 4 x F

• $\frac{1}{2}$ x F

• $\frac{1}{4}$ x F

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NGSS.HS-PS2-4

What happens to Gravitational force if I double both of the masses but don't change their distance?

• 2 x F

• $\frac{1}{2}$ x F

• 4 x F

• $\frac{1}{4}$ x F

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NGSS.HS-PS2-4

Two asteroids exert a gravitational force, F, on each other. Some time later, the asteroids are now three times as far from each other as before. Which of the following represents the gravitational force at this distance?

• $\frac{1}{3}$ x F
  

• $\frac{1}{2}$ x F
  

• $\frac{1}{6}$ x F

• $\frac{1}{9}$ x F

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NGSS.HS-PS2-4

Two objects are attracted to each other with 36 N of gravitational force. What would the new force be if the distance between them was doubled?

• 9 N

• 18 N

• 72 N

• 144 N

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NGSS.HS-PS2-4

The law of universal gravitation is credited to whom?

• your physics teacher (wow, so smart!)

• the earth

• the moon

• Newton

Complete the following statement: The farther away two planets are the _______ the gravitational force between them.

• more

• same

• less

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NGSS.HS-PS2-4