ROTATIONAL MOTION

How is rotational kinetic energy different from translational kinetic energy?

• It is always zero
• It is smaller
• It depends on moment of inertia and angular velocity instead of mass and linear velocity
• It is not real energy

What is the role of the vertical component of F2?

• To create torque
• To provide friction
• To balance the weight of the ladder
• To oppose F1

What is the role of the horizontal component of F2?

• To support weight
• To reduce N
• To provide friction that prevents sliding
• To increase torque

What would happen if the ladder were placed at a steeper angle to the wall?

• F1 and F would increase
• F1 and F would decrease
• N would decrease
• W would increase

What is the angle α that F2 makes with the horizontal?

• 30°
• 45°
• 60°
• 80°