College Physics I Spring 2015 Test 2 C 1. A car is traveling at constant speed a

Question

College Physics I Spring 2015 Test 2 C 1. A car is traveling at constant speed around a circular track. What happens to the centripetal acceleration of the car if the speed is increased to four times the original speed? A) The centripetal acceleration remains the same. B) The centripetal acceleration increases by a factor of 2. C) The centripetal acceleration increases by a factor of 4. D) The centripetal acceleration is decreased by a factor 16. E) the centripetal acceleration is decreased by a factor of one-fourth.

Explanation / Answer

Acceleration is given as rate of change of velocity with respect to time.

a = dv/dt, where a = acceleration

v = velocity

If speed is increased to four times the original speed then centripital acceleration is also increased by a factor 4.

Answer c.

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