Uniform Circular Motion

A track runner is sprinting around a circular track with a radius of 50 m if the runner takes 22 seconds to compete a lap, what is the runners velocity?

• 14.3 m/s

• 2.7 m/s

• 7.13 m/s

• 1.38 m/s

What force is keeping the runner moving on the curve of the track?

• Friction

• Tension

• Gravitational

• Applied

Tags

NGSS.HS-PS2-1

If a runner with a mass of 70 kg is running 50 m on the curve of a track at a speed of 14.3 m/s, what is the runners centripetal acceleration?

• 4.1 m/s2

• 6.6 m/s2

• 0.3 m/s2

• 174.8 m/s2

Tags

NGSS.HS-PS2-1

If a runner with a mass of 70 kg is running 50 m on the curve of a track at a speed of 14.3 m/s, what is the runners centripetal force?

• 286.3 N

• 20.0 N

• 244.7 N

• 347.6 N

Tags

NGSS.HS-PS2-1

If a yoyo on a string makes 12 revolutions in 4 seconds what is the period of its motion?

• 3 s

• 0.25 s

• 16 s

• 0. 0.3 s

What force keeps the yoyo spinning in a circle?

• Friction

• Tension

• Gravitational

• Applied

Which direction would the vector arrow for velocity be pointing

• Up

• Down

• Left

• Right

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

An object is moving with uniform speed in a horizontal, counterclockwise circle. At location D, which way does the centripetal force vector point?

• Left

• Right

• Up

• Down

Tags

NGSS.HS-PS2-1

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