A 1000-kg car moving at 10 m/s brakes to a stop in 5 s. The average braking force is

Question

Quizplus · Accepted Answer

The average braking force can be calculated using the formula F = ma, where F is the force, m is the mass, and a is the acceleration. First, find the acceleration using the formula a = (v_f - v_i) / t, where v_f is the final velocity (0 m/s), v_i is the initial velocity (10 m/s), and t is the time (5 s). This gives a = (0 - 10) / 5 = -2 m/s^2. The negative sign indicates deceleration. Then, F = (1000 kg)(-2 m/s^2) = -2000 N. The negative sign indicates the direction of the force is opposite to the direction of motion, but since the question asks for the magnitude, the answer is 2000 N.

A 1000-Kg Car Moving at 10 M/s Brakes to a Stop