A car accelerates uniformly from rest at 2 m/s² for 5 s. Its final velocity is:

Solution

Physics sir · 3 steps

Starts from rest, so the whole final velocity comes from acceleration times time: v = at.

1. Pick the equation. Acceleration is uniform, so use the first equation of motion. Starting from rest means u = 0.

   v = u + at

2. Put in numbers. v = 0 + 2 m s⁻² × 5 s = 10 m s⁻¹.
3. So. The car's final velocity is 10 m s⁻¹, option (b).

The idea to keep. When the question asks for velocity after a given time, reach for v = u + at. Acceleration tells you how much velocity is added every second.

Answer from the NTA final answer key. Solution by PrepWiser.