A force of 100N, acting over a distance of 10 m, increases the kinetic energy of a moving object by 500J. This information is sufficient to conclude that
a.) the object was accelerated.
b.) there was friction present.
c.) the potential energy changed.
d.) all of the above.
2006-09-30 13:35:27 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics
The only conclussion we can arrive at with the given data is a( the object was accelerated. We need initial velocity to conclude the other 2
2006-09-30 14:00:43 · answer #1 · answered by Dr M 5 · 0⤊ 0⤋
If the direction of the force is in line with the motion, then 1000 joules of work were done or 1000 joules of energy expended. The kinetic energy increased by only 1/2 of the energy expended.
That energy went someplace. It could be that friction caused 500 joules to escape as heat. It could be that the object went up a hill so that the potential energy increased by 500 joules. It could be that a combination of those things explains where the other 500 joules went.
2006-09-30 22:57:00 · answer #2 · answered by sojsail 7 · 0⤊ 0⤋