what is the average speed of an object that travels 20 meters east and the back to its starting location exacting 13 seconds? whats is its average velocity?

Aman does 500 j of work pushing a car a distance of 2 m. how much force does he apply? assume there is no friction. a. 250 n b. 1000 n c. 125 n d. 500 n

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Un jugador de beisbol batea un foul recto en el aire.la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher