Rotational Motion

The number of complete revolutions per second is:

• frequency

• period

• torque

• rotational inertia

Tags

NGSS.HS-PS4-1

The time required for one complete revolution is:

• torque

• frequency

• period

• rotational kinetic energy

The drum of a washing machine rotates 1800 times in 3 minutes. What is the period?

• 0.1 s

• 0.2 s

• 0.3 s

• 0.5 s

Which represents the acceleration of the ball?

• A
• B
• C
• D

Tags

NGSS.HS-PS2-1

A ball on a string is travelling in circular motion. Which vector represents the centripetal force?

• The green vector because it points towards the center of the circular path
• The blue vector because it shows the direction of the object's inertia
• The green vector because it shows the path of the ball
• The blue vector because this is the way the ball will move when it is released.

Tags

NGSS.HS-PS2-1

Where is the net force when the rollercoaster is at the top of the loop?

• Towards the sky
• Towards the Right
• Towards the left
• Towards the ground

Tags

NGSS.HS-PS2-1

What is the velocity formula for uniform circular motion?

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If the radius of the string is .3 meters long and the stopper makes 5 revolutions per second, what is the speed of the stopper? (T = period = time for ONE revolution, not 5)

• 9.4 m/s

• 6.8 m/s

• 11.7 m/s

• 3.5 m/s

what is the centripetal acceleration formula?

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• 
• 

Tags

NGSS.HS-PS2-1

What's the centripetal acceleration of a .2 kg yoyo spun in a circle with a radius of .7 meters at a velocity of 3 m/s?

• 8.23 m/s²

• 10.54 m/s²

• 12.86 m/s²

• 17.39 m/s²

Tags

NGSS.HS-PS2-1