Answer: Time.
Explanation:
Hey there!!!
The reason is,
According to the question we have,
Initial velocity = 0m/s { as it starts from rest}.
Final velocity = 650 m/s
acceleration = 5m/s^2.
Looking on this formula,
[tex]a = \frac{v - u}{t} [/tex]
Where "v" represents final velocity, "u" represents initial velocity and "a" represents acceleration. We dont have is time "t".
So, it's obvious that tine is an unknown variable.
Hope it helps...
