ROTATIONAL MOTION

If torque is halved and moment of inertia is doubled, what happens to angular acceleration?

• Halves
• Becomes one-fourth
• Doubles
• Remains same

A point mass m is at a distance r from the axis. What is its moment of inertia?

• mr
• mr²
• m²r
• m/r²

What is the angular displacement in radians for half a revolution?

• π/2 rad
• π rad
• 2π rad
• 4π rad

A wheel rotates through 6 radians under a constant torque of 5 Nm. How much work is done?

• 10 J
• 20 J
• 30 J
• 60 J

What is the power delivered by a torque of 8 Nm acting on a body rotating at 3 rad/s?

• 8 W
• 16 W
• 24 W
• 32 W