Question

A car is being driven by a force of 2.5 ✕ 10¹⁰ N. Travelling at a constant speed of 5 m/s, it takes 2 minutes to reach a certain place. Calculate the work done.

Answer 1

Force applied by the car, (F) = 2.5 × 10¹⁰ N
Speed of the car, (v) = 5 m/s
Time taken, (t) = 120 s
So distance travelled,
Distance = Speed × Time
= 5 × 120 m
= 600 m
So, Work done = (Force) × (Distance)
$$\begin{gathered} =2.5\times {10}^{10}\times 600\mathrm{J} \\ =\boxed{1.5\times {10}^{13}\mathrm{J}} \end{gathered}$$