A brake is applied to a car traveling at a constant speed of 25 m/s. If the deceleration caused by the braking action is 5 m/per second squared, find the time before the car stops.
Determine the distance traveled before the car stops, IF the car stops at t = 5 seconds.
a. 52.5 m
b. 62.5 m
c. 25 m
d. 50 m
Solution briefly shows the calculations necessary to find the braking distance and time of a car travelling at constant speed.
Kinetic energy compared
Compared to a car moving at 10 miles per hour, how much kinetic energy does that same car have when it moves at 20 miles per hour? At 30 miles per hour? At 60 miles per hour? What do these numbers suggest to you about the difficulty of stopping a car as its speed increases?View Full Posting Details