m=.03579 kg
v=355 m/s
What will the kinetic energy be in 18.49 seconds?
I know how to find the kinetic energy, but i just don't know how to factor in time.
2007-10-16 18:44:42 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
It is a bullet traveling straight up. With that i'm assuming it would be -9.8? Then what do i do with that?
2007-10-16 19:41:02 · update #1
The change would come it there is some force reducing or increasing the velocity, and since K = .5 mv^2, if you change the velocity you change K. So is this system accelerating?
2007-10-16 18:54:31 · answer #1 · answered by BJ 4 · 0⤊ 0⤋
Unless there is a force acting on the mass, the kinetic energy will not change.
2007-10-17 01:48:15 · answer #2 · answered by gp4rts 7 · 0⤊ 0⤋
assuming no forces exist to slow it down(and convert the energy to potential energy the kinetic energy doesn't change!)
so its KE = mv^2
.03579 * 355^2
4510.43 J
2007-10-17 01:54:17 · answer #3 · answered by I have 0 characters to work with 3 · 0⤊ 1⤋
Hes right. If it was moving accelerating up or down or if there was a coefficient of friction involved it could be solved. otherwise it doesnt change.
2007-10-17 01:55:28 · answer #4 · answered by Cameron K 3 · 0⤊ 0⤋