A car is moving straight along a horizontal road when a constant braking force acts on it.
PHYSICS · Multi-part · CBSE · Physics · Work and Energy · Work and Energy
Problem
A car is moving straight along a horizontal road when a constant braking force acts on it.
(a) The braking force acting opposite to the direction of motion is 500N. The car travels 20m before coming to rest. Calculate the work done by the braking force, clearly mentioning its sign.
(b) Suppose instead that a towing vehicle pulls the same car forward with a horizontal force of 500N through the same displacement of 20m. Calculate the work done in this case and comment on how the sign differs from part (a).