When does a rigid body rotate about a fixed axis?

a$.$ When there is no extemal force acting on it

b$.$ When the net force acting on it is nonzero

d$.$ When it is subjected to only translational motion

c$.$ When the net torque acting on it is zero

e$.$ When it is experiencing elastic deformation

f$.$ When it is floating in space

Which of the following statements is true about angular velocity?

a$.$ It is a vector quantity

b$.$ It is always constant for a rotating rigid body

d$.$ It is independent of the axis of rotation

c$.$ It is measured in radians per second

c$.$ It is equal to the linear velocity of a point on the body

f$.$ It decreases with increasing radius of rotation

What is the relationship between linear velocity and angular velocity for a point on a rotating rigid body?

a$.$ They are equal

b$.$ Linear velocity is proportional to angular velocity

d$.$ There is no relationship between them

c$.$ Linear velocity is inversely proportional to angular

e$.$ Linear velocity is the derivative of angular velocity velocity

f$.$ Angular velocity is the derivative of linear velocity

Which of the following statements about angular acceleration is correct?

a$.$ It is always constant for a rotating rigid body

b$.$ It is measured in meters per second squared

d$.$ It is independent of the moment of inertia of the body

c$.$ It is equal to the rate of change of angular velocity

e$.$ It is inversely proportional to the radius of rotation

f$.$ It is always directed along the axis of rotation