a motorcycle begins at rest and accelerates uniformly at 7.9 m/s2. We want to find the time it takes the motorcycle to reach a speed of 100 km/h. Which kinetic formula would be most useful to solve for the target unknown?

Question

Physics

Lincoln Garrett

23 January, 18:41

a motorcycle begins at rest and accelerates uniformly at 7.9 m/s2. We want to find the time it takes the motorcycle to reach a speed of 100 km/h. Which kinetic formula would be most useful to solve for the target unknown?

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Answers (2)

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Barkley · Answer 1

Answer:3.5 seconds

Explanation:

initial velocity=u=0

Final velocity=v=100km/h

Final velocity=v = (100x5) / 18=500/18=27.8 m/s

Acceleration=a=7.9m/s^2

t = (v-u) / a

t = (27.8-0) / 7.9

t=27.8/7.9

t=3.5 seconds

Noelle · Answer 2

It takes the motorcycle about 12.65 seconds to reach 100mph