An object moves around a circular path at a constant speed and makes five complete revolutions in 20 seconds. What is the period of rotation?

• 5s

• 10s

• 4s

• 20s

An object moves around a circular path at a constant speed and makes ten complete revolutions in 5 seconds. What is the frequency of rotation?

• 2Hz

• 4Hz

• 6Hz

• 20Hz

Tags

NGSS.HS-PS4-1

An object rotates with a frequency of 50 Hz. What is the period of rotations?

• 0.02s

• 0.15

• 0.25

• 0.05

A 15.0 kg mass is spun in a circle of radius 5.0 m with a frequency of 25 Hz. What is its velocity?

• 1287 m/s

• 895 m/s

• 785 m/s

• 12 m/s

Tags

NGSS.HS-PS4-1

A 15.0 kg mass is spun in a circle of radius 5.0 m with a frequency of 25 Hz. What is its acceleration?

• 123,245 m/s²

• 245 m/s²

• 128,245 m/s²

• 93,245 m/s²

Tags

NGSS.HS-PS2-1

An object is experiencing an acceleration of 12 m/s² while traveling in a circle at a velocity of 3.1 m/s. What is the radius of its motion?

• 0.123 m

• 0.8 m

• 88 m

• 0.26 m

A 61 kg object is experiencing a net force of 25 N while traveling in a circle of radius 35 m. What is its velocity?

• 13.8 m/s

• 28 m/s

• 8 m/s

• 3.8 m/s

Tags

NGSS.HS-PS2-1

A 0.25 kg object is experiencing a net force of 15 N while traveling in a circle at a velocity of 21 m/s. What is the radius of its motion?

• 7.35 m

• 15 m

• 3.5 m

• 0.35 m

Tags

NGSS.HS-PS2-1

A 61 kg object is experiencing a net force of 250 N while traveling in a horizontal circle of radius 1.5 m. What is its velocity?

• 25 m/s

• 2.5 m/s

• 7.7 m/s

• 6.15 m/s

Tags

NGSS.HS-PS2-1

1. A 0.65 kg ball is attached to the end of a string. It is swung in a vertical circle of radius 0.50 m. At the bottom of the circle its velocity is 2.8 m/s.

a. Draw a free body diagram for the ball when it is at the top of the circle. Next to that diagram indicate the direction of its acceleration.

b. Use that free body diagram to set up the equations needed to determine the Tension in the string.

c. Solve those equations for the Tension in the string.

• 3.83 N

• 16.57 N

• 9.8 N

• 0N

Tags

NGSS.HS-PS2-1