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?

In order to do work, the force vector must be question 1 options: in a different direction than the acceleration vector. in a different direction than the displacement vector. in the same direction as the displacement vector and the motion. in the same direction as the acceleration vector.