ROTATIONAL MOTION

What is the final angular speed in rad/s when a body rotates at 3120 rev/min?

• 98π rad/s
• 100π rad/s
• 102π rad/s
• 104π rad/s

An engine increases its angular speed from 1200 rev/min to 3120 rev/min in 16 seconds. What is the angular acceleration in rad/s²?

• 2π rad/s²
• 3π rad/s²
• 4π rad/s²
• 5π rad/s²

In rotational kinematics, what does a horizontal line on an angular acceleration-time graph indicate?

• Zero angular velocity
• Changing angular displacement
• Constant angular acceleration
• No rotation

What is the primary purpose of using radians in rotational motion?

• To make numbers smaller
• To match clock readings
• To maintain consistency in calculus and physical laws
• To avoid using π

What is the angular acceleration if the angular velocity does not change over 10 seconds?

• 10 rad/s²
• 1 rad/s²
• 0 rad/s²
• Cannot be determined