A toy car of mass 2 kg is moving due east with a speed of 10 m s
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A toy car of mass 2 kg is moving due east with a speed of 10 m s−1. For the first 3 s, a constant 4 N force acts on it due west. Immediately after this, for the next 2 s, a constant 6 N force acts due east. Neglect all other forces.
Using this information, answer the following parts.
(i) Calculate the acceleration of the car during the first 3 s.
(ii) Determine the velocity (magnitude and direction) of the car at the end of the first 3 s.
(iii) Calculate the acceleration of the car during the next 2 s.
(iv) Find the final velocity (magnitude and direction) of the car at the end of 5 s from the start.
(v) Compute the total change in momentum of the car over the entire 5 s interval, stating its direction.