11-02-2020
Physics

contestada

A car starting from rest accelerates at a rate of 8.0 m/s/s. What is it’s final speed at the end of 4.0 seconds?

Respuesta :

ednorobello92 ednorobello92

11-02-2020

Answer: vf = 32 m/s

Explanation: Solution:

Use the formula for acceleration:

a = vf - vi / t

initial velocity vi = 0 since it is at rest.

derive to find vf:

vf = at + vi

= 8.0 m/s² ( 4.0 s ) + 0 m/s

= 32 m/s

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