Conservation Principles in Rotation

True or False: If you are standing on a rotating object and then move radially outwards from the center, the angular momentum will decrease.

• True

• False

In an earth-ball system, the ball is rolling down a hill. At the bottom of the hill what type(s) of energy does it have?

• potential of a spring

• potential due to gravity

• translational kinetic energy

• rotational Kinetic energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

An object sliding down a frictionless incline will reach the bottom _____________ than a rolling object released from the same height.

• in more time

• in less time

• with more kinetic energy

• with less kinetic energy

Tags

NGSS.HS-PS3-2

Select all of the following that will increase you angular momentum while spinning in a chair.

• Reduce your moment of inertia

• Pulling arms and legs in

• Sticking your arms and legs out

• Have someone push at your center of mass

• Have someone apply a torque to you

True or False: Angular momentum is always conserved for orbiting objects if the external torque is zero.

• True

• False

As a planet gets farther away from its star, its speed will ___________ and its total momentum & total energy will ___________.

• decrease, increase

• increase, decrease

• decrease, remain the same

• remain the same, decrease

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

As a planet gets closer to its star, its speed will ___________ and its total momentum & total energy will ___________.

• decrease, increase

• increase, remain the same

• decrease, remain the same

• increase, decrease

True or False: Objects moving in a straight line may have angular momentum.

• True

• False

True or False: If you are standing on a rotating object and then move radially outwards from the center, the moment of inertia of the system is increasing.

• True

• False

True or False: As you move radially outwards from the center of a rotating object, work will be done and therefore change the energy.

• True

• False