I often see students and instructors with the pants-legs and sleeves of their uniforms so long they have to roll them up. do you or others where to train or teach allow this?
It could be the bearing in the water pump.
The second push canceled out the first newton used during the initial acceleration. The first newton canceled out the second newton during the deceleration to zero. The last newton remains kinetic accelerating the football from zero in the opposite direction of the first push.
