ROTATIONAL MOTION

If the angular acceleration vector points opposite to the angular velocity vector, what is happening to the rotation?

• The body is speeding up
• The body is moving at constant speed
• The body is slowing down
• The axis of rotation is changing

What is the angular acceleration of a body moving with constant angular velocity of 5 rad/s?

• 5 rad/s²
• -5 rad/s²
• 0 rad/s²
• 25 rad/s²

In rotational motion, what does a steeper slope on an angular velocity-time graph indicate?

• Greater angular displacement
• Lower angular velocity
• Greater angular acceleration
• Shorter time interval

Which of the following equations can be used to find angular displacement when initial and final angular velocities and time are known?

• θ = ωt
• θ = θ₀ + ½(ω₀ + ω)t
• θ = ω₀t + αt²
• θ = ω²/(2α)

What is the angular displacement when a body completes half a revolution?

• π/2 radians
• π radians
• 2π radians
• 90 degrees