Rotation Rigid Body

Which of the following is true about a rotating rigid body

• Its centre of rotation is at rest

• The centre of rotation is at the centre of mass

• All points on the body are moving with the same linear velocity

• Every points in the body are movng with the same angular velocity

When the object tends to rotate in a clockwise rotation, the torque is

• Positive

• Negative

You and a friend are playing on the merry- go-round. You stand at the outer edge of the merry-go-round and your friend stands halfway between the outer edge and the center. Assume the rotation rate of the merry-go-round is constant. Who has the greatest angular velocity?

• You

• Same

• Your friend

You and a friend are playing on the merry- go-round. You stand at the outer edge of the merry-go-round and your friend stands halfway between the outer edge and the center. Assume the rotation rate of the merry-go-round is constant. Who has the greatest tangential velocity?

• You

• Your friend

• Same

A body with a definite shape that doesn't change is:

• period

• angular acceleration

• rigid body

• radius of gyration

The number of complete revolutions per second is:

• frequency

• period

• torque

• rotational inertia

How many radians make up one revolution of 360 degrees?

• π/2

• π

• 2π

• 3π/2

"Angle undergoes from a fixed reference line" this statement refer to

• Average angular velocity, 𝝎_𝒂𝒗

• Angular displacement,𝜽

• Instantaneous angular velocity, 𝝎

• angular acceleration

"Rate of change of angular displacement" this statement refer to

• Angular displacement,𝜽

• angular acceleration

• Average angular velocity, 𝝎_𝒂𝒗

• Instantaneous angular velocity, 𝝎

"Angular acceleration at a specified position or at a particular of time" this statement refer to

• Average angular velocity, 𝝎_𝒂𝒗

• Angular displacement,𝜽

• Instantaneous angular acceleration, 𝜶

• Instantaneous angular velocity, 𝝎