PHYSICS: Rotational Motion

A 0.12-m-radius grinding wheel takes 5.5 s to speed up from 2.0 rad/s to 11.0 rad/s. What is the wheel's average angular acceleration?

• 9.6 rad/s/s
• 4.8 rad/s/s
• 3.1 rad/s/s
• 1.6 rad/s/s

Tags

NGSS.HS-PS2-1

A 0.30m radius automobile tire rotates how many rad after starting from rest and accelerating at a constant 2.0 rad/s² over a 5.0 s interval?

• 25 rad
• 12.5 rad
• 2 rad
• 0.5 rad

If the radius of the string is 0.3 meters long and the bob makes 5 revolutions per second, what is the speed of the stopper?

• 9.4 m/s

• 6.8 m/s

• 11.7 m/s

• 3.5 m/s

An object is moving with uniform speed in a counterclockwise, horizontal circle. Which of the following images correctly depicts the force vector and velocity vector at a point in time.

• 
• 
• 
• 

Tags

NGSS.HS-PS2-1

A test car moves at a constant speed around a circular track. If the car is 75.0 m from the track’s center and has a centripetal acceleration of 19.6 m/s², what is the tangential speed?

• 1470 m/s

• 3.83

• 38.3

• 19.6

A student sits on a merry-go-round that has a period of revolution of 45.0 seconds. If the student is on a carousel horse that is 4.50 meters from the center, what is the student’s centripetal acceleration?

• 9.80 m/s²

• 1.23 m/s²

• 0.0532 m/s²

• 0.0876 m/s²

Tags

NGSS.HS-PS2-1

 2600 rev/min is equivalent to which of the following?

• 2600 rad/s 
• 43.3 rad/s 
• 273 rad/s
• 60 rad/s

Tags

CCSS.HSF.TF.A.1

A grindstone spinning at the rate of 8.3 rev/s has what approximate angular speed?

• 3.2 rad/s
• 26 rad/s
• 52 rad/s
• 81 rad/s

Tags

CCSS.HSF.TF.A.1

A 0.12-m-radius grinding wheel takes 5.5 s to speed up from 2.0 rad/s to 11.0 rad/s. What is the wheel's average angular acceleration?

• 9.6 rad/s/s
• 4.8 rad/s/s
• 3.1 rad/s/s
• 1.6 rad/s/s

What is the angular speed about the rotational axis of the Earth for a person standing on the surface?

• 7.3 x 10^-5 rad/s
• 3.6 x 10^-5 rad/s
• 6.28 x 10^-5 rad/s
• 3.14 x 10^-5 rad/s