Question

Think of the term that fits into or defines the given statement and fill in the given boxes with the correct spellings of that term.

When the brakes are applied on a moving car, work done by the breaking force is _________.

Answer 1

1. The braking force causes resistance against the motion that was already being carried out.
2. Hence the force applied is in the opposite direction of the displacement, so the work done is negative.
3. $$\begin{gathered} Workdone=Force\times Displacement\times Anglebetweenthem \\ W=FS\cos \theta \\ Wwillbenegativeif\cos \theta isnegative \\ here\theta ={180}^0 \end{gathered}$$

Hence, when the brakes are applied on a moving car, work done by the braking force is negative.