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15 questions
A tennis ball on a string is spun clockwise around a circle. After the string breaks, which path will the tennis ball follow?
Path I
Path II
Path III
Path IV
The _______________________ supplies the centripetal force requirement for the car to move in a horizontal circle. Without it, the car would turn its wheels but would not move in a circle (as is the case on an icy surface).
friction force
centrifugal force
normal force
applied force
The amount of time it takes for an object to return to the same position (complete one revolution) is its
tangential velocity
tangential acceleration
centripetal acceleration
period
(a) is how fast something moves and is always (b) in uniform circular motion. (c) is speed with (d) , which is always changing in uniform circular motion.
The diagram shows a stone tied to the end of a length of string and is whirled round in a horizontal circle . What provides the centripetal force on the stone?
The weight of the string.
The friction in the string.
The tension in the string.
The air resistance from the surroundings.
A mass on a string rotates 10 times in 5 seconds. What is the period?
0.5 s
0.2 s
2.0 s
50 s
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