While you are driving at a constant speed of 30 mph (or 44 ft/s), what distance do you travel if it took you 0.8 s to realize that you have to slam on the brakes to avoid hitting a person that runs onto the road in front of you?

Explanation:

Given:

Distance travelled during the time span:

Actually the distance travelled before stopping the car will be greater than this distance, because after the application of brakes the car will take some time to come to rest.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.