An automobile accelerates at 4 m/#s^2# from 20 m/s to 36 m/s. How long did that acceleration take?

1 Answer
Aug 13, 2017

Answer:

#4 s#

Explanation:

According to the given information,

acceleration 'a' = 4 m/#s^2#
initial velocity 'u' = 20 m/s
final velocity 'v' = 36 m/s

Now, I have to find how long the acceleration of the automobile takes place.
refer that 't' is time taken

Using equation,
#v = u + at#

#rArr 36 = 20 + 4t#

value of 't' comes out to be 4 s.