Physics Review Question




Unit: Circular Motion
Year: 1990 Question#: 61
Question: What is the magnitude of the centripetal force acting on the object?

(1 ) 2.5N
(2 ) 10.N
(3 ) 25N
(4 ) 50N

What is this question really asking?





Explanation by: Kate and Chris

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Answer 1
2.5N

INCORRECT

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Answer 2
10.N

INCORRECT; To arrive at this answer, one may have forgotten to square the velocity.

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Answer 3
25N

INCORRECT

One may not have divided by the radius to arrive at this answer.

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Answer 4
50N

CORRECT

Use formulas: F=ma and

to arrive at the equation


Use m=1kg, v=5 m/s, and r=0.50m to arrive at the answer 50N. return to top


























What's this question really asking?

How great is the centripetal force acting on the object? return to top

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