A 90kg student is walking along at a rate of 1.5 m/s. He starts to run and 3 seconds later is moving at a pace of 6m/s. what force have his legs exerted to help him run?

it should be -8.6 cm hope this out

f=ma newton

f=100x2.5=250n

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.