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

Question

4 years ago

6

acceleration over this time interval?

1 answer:

Neporo4naja [7] · Answer 1 · 2021-11-27T19:39:18+03:00

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

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