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A car 0 to 20m/s in 7 seconds. What is his acceleration?

When hitting the breaks, the car goes from 30m/s to 0 in just 10 seconds. What is his acceleration?

Respuesta :

crissz67

Answer:

from 0 to 20 m/s

a = ( v- u)/t

a = (20 - 0)/7

a = 20/7 =2.9m/s^2

from 30m/s to 0m/s

a = (0-30)/10

a = -30/10

a= -3 m/s^2

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