An automobile of mass 2000 kg moving at 20 m/s is braked suddenly with a constant braking force of 10,000 N.How far does the car travel before stopping?
A) 40 m
B) 80 m
C) 120 m
D) 160 m

Question

Quizplus · Accepted Answer

Explanation:Using the equation of motion, v^2 = u^2 + 2as, where v is the final velocity (0 m/s), u is the initial velocity (20 m/s), a is the acceleration (-5 m/s^2), and s is the distance traveled. Substituting the values, we get 0^2 = 20^2 + 2*(-5)*s, which gives s = 40 m.

An Automobile of Mass 2000 Kg Moving at 20 M/s