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?
KE=12mv2
(1 point)
Responses
Her kinetic energy stays the same.
Her kinetic energy doubles when she cools down.
Her kinetic energy decreases by a factor of 4 when she cools down.
Her kinetic energy decreases by a factor of 2 when she cools down.