A child rides a bicycle in a circular path with a radius of 2.0 m. Please help!?

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phyicsgirl08

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A child rides a bicycle in a circular path with a radius of 2.0 m. The tangential speed of the bicycle is 2.0 m/s. The combined mass of the bicycle and the child is 43 kg.
What is the magnitude of the bicycle's centripetal acceleration?
A. 1.0 m/s^2
B. 2.0 m/s^2
C. 4.0 m/s^2
D. 8.0 m/s^2
 
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