Honors Physics Unit 7: Rotational Motion and the Law of Gravity

A radian is all of the following EXCEPT

• A dimensionless quantity
• The ratio of arc length over radius
• The same as degrees
• The unit for rotational position

If the translational velocity of an object is 3 m/s, and is located a distance of 2 m from the axis of rotation, what is the object's angular velocity?

• 0.67 rad/s
• 1.5 rad/s
• 5 rad/s
• 6 rad/s

If the angular velocity of an object changes from 3 rad/s to 1 rad/s in 2 seconds, what is the object's angular acceleration?

• –1.5 rad/s^2
• –1 rad/s^2
• 1 rad/s^2
• 1.5 rad/s^2

An object completes 1.5 circular orbits in half a minute. What is its approximate angular velocity?

• 0.05 rad/s
• 0.30 rad/s
• 0.5 rad/s
• 3 rad/s

Tags

NGSS.HS-ESS1-4

A wheel starts from rest and rotates with a constant angular accel about a fixed axis.  It completes the first revolution in 6 sec after it starts.  How long after it started will the wheel complete the 2nd revolution?

• 9.9 sec
• 7.8 sec
• 8.5 sec
• 9.2 sec

Earth and the Moon __ on an axis

• rotate
• revolve

The moon __ around Earth

• Rotates
• Revolves

Tags

NGSS.HS-PS2-4

NGSS.HS-ESS1-4

A dog sits 1.5 m from the center of a merry-go-round. The merry-go-round is set in motion, and the dog’s tangential speed is 1.5 m/s. What is the magnitude of the dog’s centripetal acceleration?

• 3.9 m/s^2
• 2.8 m/s^2
• 1.5 m/s^2
• 11.5 m/s^2

The force that is necessary to keep the bucket swinging in a circle is called the:

• tangential velocity
• centrifugal force
• centripetal force
• the force of gravity

Tags

NGSS.HS-PS2-1

The Earth completes one of these every 365.25 days

• rotation

• revolution