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A sprinter runs 100 meters at a speed of 7 meters per second. Then she cools down by running 100 meters at 3.5 meters per second. What is the best prediction? Her kinetic energy decreases by a factor of 4 when she cools down Her kinetic energy doubles whe...

a big rig truck loses its brakes going down a steep highway/ The truck has a mass of 36,300 kilograms and is traveling at 78 miles per hour ( 38.4 meters per second.) How much kinetic energy does the truck have when the driver turns into the deep gravel o...