Gravity

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

• F=Gm₁m₂/r
• F = Gm₁m₂/r²
• F = Gm₁m₂/2r
• F = m₁m₂/2r

Tags

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

Two masses 8000 kg and 1500 kg are 1.5 m apart. Find their gravitational pull.

• 3 N

• 0.0003 N

• 3000 N

• 30 N

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NGSS.HS-PS2-4

Calculate the centripetal force required to make a 5 kg ball move 4 m/s in a circle with a radius of 2 m.

• 10 N
• 20 N
• 30 N
• 40  N

Tags

NGSS.HS-PS2-1

What effect does increasing the distance between the objects 3 times have upon the gravitational attractive force between them?

• 1/3 the amount of force will exist

• 3 times the amount of force will exist

• 1/9 the amount of force will exist

• 9 times the amount of force will exist

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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?

• doubles
• half as big
• 4x bigger
• 4x smaller

Tags

NGSS.HS-PS2-4

According to Newton's law of gravitation, the Earth and the Moon are gravitationally attracted to each other. The more massive Earth attracts the Moon with...

• a stronger force than the Moon attracts the Earth.

• a weaker force than the Moon attracts the Earth.

• the same force as the Moon attracts the Earth.

• a force that is sometimes stronger and other times weaker than the Moon attracts the Earth.

Tags

NGSS.HS-PS2-4

Which of the following best explains why a person has less weight on top of a mountain?

• They are closer to space.

• The atmosphere is lighter.

• The mountain adds more mass.

• The mountain adds more distance.

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NGSS.HS-PS2-4

The law of universal gravitation is credited to whom?

• Einstein
• Galileo
• Darwin
• Newton

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NGSS.HS-PS2-4

Why do astronauts in space appear weightless? 

• There is no gravity in space. 
• Air resistance opposes gravity. 
• They have no mass in space.
• They are in free fall.