Question

If speed of car decreases with rate of 2 m/s^2 of initial speed 20m/s . What timeit should takes to stop​

Answer 1

Answer:

10 second

Explanation:

we know u=20m/s

v=0m/s

a= -2m/s²

t=? to be calculated

by using first equation of motion

i.e,. at=v -u

-2t = 0 - 20

t= - 20/-2

t= 10 sec