An object moving in a circle is tied to a string. What happens when the string is cut?
Correct answer: B. it flies off along a tangent
- A. it continues moving in a circle
- B. it flies off along a tangent
- C. it falls straight down
- D. none of these
Explanation
An object moving in a circle is tied to a string. When the string is cut, it flies off along the tangent due to centripetal force.
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About Angular and Linear Quantities
Rotational motion relates angular displacement, angular velocity and angular acceleration to linear displacement, tangential velocity and tangential acceleration through the radius. Questions use radians, v equals r omega and tangential acceleration, while distinguishing tangential velocity from centripetal acceleration and angular quantities from their linear counterparts.
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