ROTATIONAL MOTION

If the net torque on a body is zero about one point and the net force is also zero, what can be concluded about torque about another point?

• It becomes infinite
• It changes sign
• The net torque is also zero about any other point
• It depends on mass

What is the physical meaning of the z-component of total torque being zero in equilibrium?

• The body moves along z
• The force is maximum
• There is no tendency to rotate about the z-axis
• The mass is zero

How does the concept of a couple illustrate the independence of torque from origin when net force is zero?

• It produces different torques
• It cancels all motion
• A couple produces the same torque about any point because net force is zero
• It only works at the center

In rotational equilibrium, what can be said about the angular velocity of a rigid body?

• It must be zero
• It keeps increasing
• It can be non-zero but constant
• It changes randomly

What is the significance of splitting vector equations into scalar components in equilibrium analysis?

• It makes the problem harder
• It reduces accuracy
• It allows solving each spatial direction independently
• It eliminates the need for vectors