Question

When the driver in the car moving with a speed of 15 ms-1 increases the
speed at a constant rate of 5 ms-2 . Calculate the speed attained by the
car, at the end of 5 s.

Answer 1

Final velocity is equal to initial plus acceleration multiplied by time
Vf = Vi + at
Vf = (15m/s) + (5m/s^2)(5s)
Vf = 15m/s + 25m/s
Vf = 40m/s

This is straight from the kinematic equations. If you can’t solve a simple problem like this, I suggest tryin to study it a bit more. You’re gonna have trouble if you can’t dissect a word problem