It's c/f, in which c is the speed of light (300000 m/s)
Given :
Initial velocity, u = -15 m/s.
Acceleration , a = 2 m/s².
Time taken to applied brake, t = 2.5 s.
To Find :
The velocity of the car at the end of the braking period.
How far has the car moved during the braking period.
Solution :
By equation :

Now, distance covered by car is :

Hence, this is the required solution.
Where are the following awnsers?
The planet MARS is visible without a telescope on many clear nights. The planets JUPITER, MERCURY, VENUS and SATURN are also viewable without the aid of magnification.

Given terms :
- time (t) = 90 minutes = 1.5 hour
As we know, Distance covered is equal to :