AP Physics Review Gravity

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

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

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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

As distance between two objects doubles, the pull of gravity

• doubles

• is 1/4 of the original pull

• stays the same

• halves

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NGSS.HS-PS2-4

As distance separating the objects increases the force

• increases
• decreases
• stays the same

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NGSS.HS-PS2-4

A particle P is moving in a circle with uniform speed. Which one of the following diagrams correctly shows the direction of the acceleration a and velocity v of the particle at one instant of time?

• A
• B
• C
• D

Double the product of the masses of two objects

• 4 times stronger gravity force
• 4 times weaker gravity force
• 2 times weaker gravity force
• 2 times stronger gravity force

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NGSS.HS-PS2-4

What is the direction of the velocity at point B, if the ball is revolving clockwise?

• up
• right
• down
• left

Centripetal acceleration always points

• in the direction of the object's motion
• in the opposite direction of the object's motion
• towards the center of the circle
• towards the outside of the circle

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

• 9 N

• 18 N

• 72 N

• 144 N

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NGSS.HS-PS2-4

A ball on a string is travelling in circular motion. Which vector represents the centripetal force?

• The green vector because it points towards the center of the circular path
• The blue vector because it shows the direction of the object's inertia
• The green vector because it shows the path of the ball
• The blue vector because this is the way the ball will move when it is released.

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NGSS.HS-PS2-1