DC -- quiz torque center of gravity

Which term = uniform circular motion

• velocity perpendicular to the surface

• constant angular velocity

• applied force at an angle

Which equation would be used to calculate angular velocity?

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According to sign convention, which direction is considered negative?

• clockwise

• counterclockwise

What are the units of angular acceleration?

• Newtons

• rad/s

• radians

• rad/s/s

Angular acceleration is a vector, having both magnitude and direction. How do we denote its direction?

• by color

• with a small up/down arrow behind the number

• with a free body diagram

• with a positive or negative sign

Which symbol represents the arc length?

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Angular velocity is the rate of change of the ___.

• tangent

• acceleration

• radius

• angle

Which variable represents angular displacement?

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The direction of centripetal acceleration is ---

• tangent to the circle

• toward the center of the circle

• outward along the line of the radius

• in the direction of motion

The centripetal force causing the car to turn in a circular path is due to ___.

• the mass times gravity

• the normal force

• friction between the tires and the road

• friction between the driver and the passenger