Question

An auto's velocity decreases uniformly from 20 m/s to 6 m/s while covering 70 m. The acceleration is :

(1) –2.6 m/s2

(2) 6.2 m/s2

(3) 2.6 m/s2

(4) 4.2 m/s2​

Answer 1

Answer:

acceleration= - 2.6m/s^2

Explanation:

Given information

initial velocity u=20m/s

final velocity v=6m/s

distance cover s=70m

acceleration a=?

by using netwon equation

v^2=u^2 + 2as

6=20 +2×a×70

a= - 2.6 m/s^2 ans