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A racecar driver accelerates many times during a race. If a driver accelerates from 70m/s to 100m/s in 1.5 seconds before making a turn, what is the acceleration on the driver?
A.Ā 30ms2
B.Ā āˆ’30ms2
C. Ā 20ms2
D.Ā āˆ’20ms2

Respuesta :

a=(vf-vā‚€)/t

Data:
vf=100 m/s
vā‚€=70 m/s
t=1.5 s

a=(100 m/s - 70 m/s)/1.5 s=30 m/s / 1.5Ā s=20 m/sĀ².

answer: Ā C. 20 m/sĀ²

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