A force acting on an object does no work if (5 Points)
a machine is used to move the object.
the force is not in the direction of the object’s motion.
the force is greater than the force of friction.
the object accelerates.

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

Aswimmer is determined to cross a river that flows due south with a strong current. initially, the swimmer is on the west bank desiring to reach a camp directly across the river on the opposite bank. in which direction shoud the swimmer head? a. the swimmer should swim southeast. b. the swimmer should swim south. c. the swimmer shuold swim northeast. d. the swimmer should swim due north. e. the swimmer should swim due east.

Derive the formula 2as=v² -u² where the formula have have usual meanings