ROTATIONAL MOTION

What happens to work done when dθ is zero?

• Work is maximum
• Work is negative
• No work is done
• Work is infinite

What is the significance of the cross product in torque definition?

• It calculates linear force
• It gives scalar value
• It gives both magnitude and direction of torque
• It measures angular speed

What is the condition for maximum torque due to a force?

• When force is parallel to radius
• When force is at 45° to radius
• When force is perpendicular to the radius vector
• When force is along the axis

What is the role of the radius vector in torque calculation?

• It measures angular speed
• It determines mass distribution
• It determines the lever arm for the force
• It defines linear momentum

In a rigid body, what remains the same for all particles during rotation about a fixed axis?

• Linear velocity
• Linear displacement
• Angular displacement dθ
• Tangential acceleration