Circular Motion

What is the direction of the centripetal force of an object moving in a circle?

• Up
• Down
• Away from the center
• Towards the center

Which has the greater linear speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail?

• Inside
• Outside
• They are the same
• Cannot be determined

Which has the greater angular speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail?

• Inside
• Outside
• They are the same
• Cannot be determined

Which of the following is NOT a measurement of angular speed?

• Revolutions/Minute
• Radians/Second
• Meters/Second
• Revolutions/Day

A ball is swung around in a circle on a string. What happens to the centripetal force as the angular speed of the ball increases?

• The centripetal force decreases.
• The centripetal force increases.
• The centripetal force stays the same.

Tags

NGSS.HS-PS2-1

A car travels in a circle at a constant speed. What is the direction of the force?

• Directed forward, in the direction of travel
• Directed outward from the center of the curve
• Directed toward the center of the curve
• Zero because the car is not accelerating

How would you convert an angle in degrees to an angle in radians?

• Multiply the angle measured in degrees by 2π/180⁰
• Multiply the angle measured in degrees by π/360⁰
• Multiply the angle measured in degrees by π/180⁰
• Multiply the angle measured in degrees by 2πr

The gravitational force between two masses is 36 N. What is the gravitational force if the distance between them is tripled?

• 4.0 N
• 9.0 N
• 18 N
• 27 N

Tags

NGSS.HS-PS2-4

A merry-go-round is spinning counter-clockwise. Is the angular displacement positive, negative, or zero?

• Negative
• Positive
• Zero

A merry-go-round is moving counter-clockwise, but the direction of the angular acceleration is clockwise. What is the merry-go-round doing?

• The merry-go-round is spinning faster.
• The merry-go-round is spinning slower.
• The merry-go-round is spinning at a constant speed.
• The merry-go-round is not spinning at all.

Tags

NGSS.HS-PS2-1