Chapter 6 Rotational Motion

Convert 2 revolution to radian.

• 5π
• 3π
• 4π
• 2π

Convert 45 degree to revolution.

• 0.75
• 0.5
• 0.125
• 0.25

What is the average angular velocity if the angular position is 2 rad and time is 20 s?

• 0.1 rad/s
• 0.05 rad/s
• 1 rad/s
• 0.2 rad/s

What is the period if the angular velocity 2 rad/s?

• 3.14 seconds
• 2 seconds
• 6.28 seconds
• 1.57 seconds

What is angular acceleration if the angular speed is 5 rad/s and time is 2 s?

• 2.5 rad/s²
• 5 rad/s²
• 10 rad/s²
• 1 rad/s²

If the radius is 2 m and angular position is 2 rad, find the arc length.

• 2 m
• 6 m
• 8 m
• 4 m

What is tangential speed if the radius is 2 m and angular velocity is 3 rad/s?

• 8 m/s
• 4 m/s
• 6 m/s
• 10 m/s

If the centripetal acceleration is 2 m/s² and the radius is 5 m, what is the angular speed?

• 0.45 m/s
• 0.75 m/s
• 1.25 m/s
• 0.632 m/s

What is the tangential acceleration if the radius is 1 m and angular acceleration is 2 rad/s² ?

• 4 m/s²
• 1 m/s²
• 2 m/s²
• 3 m/s²

What is the moment of inertia if the rotational kinetic energy is 20 J and angular speed is 10 rad/s?

• 0.2 kg·m²
• 0.8 kg·m²
• 0.4 kg·m²
• 1.0 kg·m²