Circular Motion Review

At the top of a rollercoaster loop, In what directions do gravity and the normal force point. A free body diagram is useful to help answer the question

• gravity: down, normal force: up

• gravity: down, normal force: down

• gravity: down: normal force: direction of motion

Tags

NGSS.HS-PS2-1

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

• up
• right
• down
• left

What is the direction of the acceleration at point A, if the ball is revolving clockwise?

• up
• right
• down
• left

Tags

NGSS.HS-PS2-1

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

• up
• right
• down
• left

Tags

NGSS.HS-PS2-1

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

• up
• right
• down
• left

What happens to the centripetal force exerted on an object if you triple the velocity?

• it increases to 3X
• it decreases to 6X
• it increases to 6X
• it increases to 9X

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 relationship exists between the radius of a circle and the centripetal acceleration?

• direct
• inverse
• exponential
• inverse squared

Which of the following is the unit for centripetal force?

• J
• m/s²
• kg⋅m/s
• N

If the mass on Mars is 6.4 kg x 10²³ kg and the mass on Earth is 6.0 kg x 10²⁴ kg, which one would you weigh more on (assuming the radius didn't change the answer)?

• Earth

• Mars

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4