ROTATIONAL MOTION

How is the total kinetic energy of a rotating rigid body derived?

• By multiplying mass and velocity
• By integrating torque
• By averaging angular speeds
• By summing the kinetic energies of all its particles

At what point does the weight of the ladder act?

• At point A
• At point B
• At its center of gravity
• At point C

What is the direction of the normal reaction force N at the base of the ladder?

• Horizontally toward the wall
• Horizontally away from the wall
• Vertically downward
• Vertically upward

Why is the wall's reaction force F1 horizontal in the ladder setup?

• Because the ladder is heavy
• Because gravity acts downward
• Because the wall is frictionless
• Because the floor is rough

What determines the magnitude of the moment of inertia of a body?

• Only total mass
• Only volume
• Distribution of mass relative to the axis
• Only density