Acar is moving at a constant velocity when it is involved in a collision. the car comes to rest after 0.450 s with an average acceleration of 60.0 m/s2 in the direction opposite that of the car's velocity. what was the speed, in km/h, of the car before the collision?

97.2 km/h

Explanation:

We can solve the problem by using the following SUVAT equation:

where

v = 0 is the final velocity of the car

u is the initial velocity

a = -60.0 m/s^2 is the acceleration (negative, as it is in the opposite direction as the velocity)

t = 0.450 s is the time it takes for the car to comes to a stop

Solving for u, we find

In order to convert it into km/h, let's keep in mind that:

1 km = 1000 m

1 h = 3600 s

So we find:

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..