Question

A car travels d = 20 m in a time of t1 = 10 s. It then brakes and comes to

rest in t2 = 5 s.what was the truck's instantaneous velocity in the horizontal direction, in meters per second, when it began braking?

Answer 1

The car's instantaneous velocity in the horizontal direction when it began braking was 2 m/s

Step-by-step explanation:

The instantaneous velocity (v) can be determined using the average velocity during the initial motion before braking:

v_avg = displacement/time

For the initial motion, the displacement (d) is 20 m, and the time (t_1) is 10 s:

v_avg = 20m / 10 s = 2 m/s

Since the car is assumed to have constant velocity during this time, the instantaneous velocity (v) when it began braking is also 2m/s.