Question

A car is traveling at 20 minutes/second and is brought to rest by applying brakes over a period of 4 seconds.What is it average acceleration over this time interval?

Answer 1

-5m/s

Explanation:

Given parameters:

Speed of the car = 20m/s

Time taken = 4s

Unknown:

Average acceleration = ?

Solution:

Acceleration is the change in velocity or speed with time of a body.

  Acceleration = $\frac{v - u}{t}$

 v is the final velocity = 0

 u is the initial velocity

 t is the time

Input the values:

   Acceleration = $\frac{0-20}{4} = -5m/s$

learn more:

Acceleration brainly.com/question/3820012

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