In a collision, a vehicle decelerates at #-65# #ms^-2# for #9.4# #s#. What was its initial velocity? What was its velocity after it had been decelerating for #3# #s#?
1 Answer
The initial velocity was
Explanation:
We know the final velocity,
Rearranging:
As a real value, this is improbable, since it is equivalent to about
We can use the same equation now to find the velocity after 3 seconds:
Note that