2026 · Q53
A car of mass 800 kg is travelling at a speed of 40 km/h on a straight road. A force of 1000 N is applied on it in the direction of its velocity for 12 s. Which one among the following is the final speed of the car?
General KnowledgePhysics
- A55 km/h
- B60 km/h
- C94 km/h
- D104 km/h
Explanation
Initial speed v0 = 40 km/h = 11.11 m/s. Acceleration a = F/m = 1000/800 = 1.25 m/s^2. Final speed v = v0 + at = 11.11 + 1.25 x 12 = 26.11 m/s = 94 km/h. The answer is (C).