Extended Response
6.1 Angle of Rotation and Angular Velocity
What happens to tangential velocity as the radius of an object increases provided the angular velocity remains the same?
- It increases because tangential velocity is directly proportional to the radius.
- It increases because tangential velocity is inversely proportional to the radius.
- It decreases because tangential velocity is directly proportional to the radius.
- It decreases because tangential velocity is inversely proportional to the radius.
6.2 Uniform Circular Motion
An object is in uniform circular motion. Suppose the centripetal force was removed. In which direction would the object now travel?
- In the direction of the centripetal force
- In the direction opposite to the direction of the centripetal force
- In the direction of the tangential velocity
- In the direction opposite to the direction of the tangential velocity
6.3 Rotational Motion
Why do tornadoes produce more wind speed at the bottom of the funnel?
- Wind speed is greater at the bottom because rate of rotation increases as the radius increases.
- Wind speed is greater at the bottom because rate of rotation increases as the radius decreases.
- Wind speed is greater at the bottom because rate of rotation decreases as the radius increases.
- Wind speed is greater at the bottom because rate of rotation decreases as the radius increases.
When will an object continue spinning at the same angular velocity?
- When net torque acting on it is zero
- When net torque acting on it is non zero
- When angular acceleration is positive
- When angular acceleration is negative