Circular Motion and Universal Gravitation Review

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

Tags

NGSS.HS-PS2-4

Two massive objects placed a distance d apart from each other attract each other with a gravitational force. If they are rearranged so that they are now d/3 apart, the force is now ---.

• 9× what it was

• 1/9× what it was

• 3× what it was

• 1/3× what it was

• 6× what it was

Tags

NGSS.HS-PS2-4

Two objects pull on each other with a gravitational force. What happens to that gravitational force if I double both of the masses but don't change their distance?

• 2× what it was

• 1/2× what it was

• 4× what it was

• 1/4× what it was

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

NGSS.HS-ESS1-4

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

• more
• same
• dosen't matter
• less

Tags

NGSS.HS-PS2-4

Calculate the amount of centripetal force it takes for a softball pitcher to rotate a ball with a speed of 3.0 m/s if the ball weighs 0.12 kg and her arm is 0.65 meters long.

• 0.83 N

• 1.2 N

• 0.55 N

• 1.7 N

Tags

NGSS.HS-PS2-1

A car is rounding a bend as shown in the diagram. Which arrow correctly shows the direction of the cars velocity?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

A car is rounding a curve as shown in the diagram. Which arrow correctly shows the direction of the centripetal force keeping the car in circular motion?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

A 30-kg child is on a merry-go-round which has a radius of 1.5 m. Her sister spins her at a speed of 9.0 m/s. How big is the centripetal force acting on the child?

• 180 N

• 405 N

• 1,620 N

• 54 N

Tags

NGSS.HS-PS2-1

The time required for one complete revolution is:

• torque

• frequency

• period

• rotational kinetic energy