A car moves eastwards along a straight road; east is taken as the positive x-direction
PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A car moves eastwards along a straight road; east is taken as the positive x-direction. The driver applies the brakes and the car comes to rest in 5 s with uniform retardation. Identify the sign (positive, negative or zero) of
(i) displacement,
(ii) velocity, and
(iii) acceleration
of the car during these 5 s. Give a brief reason in each case.