Car 1 and 2 both weigh 1000kg,
Car 1 starts at top of 25m hill,
Car 2 starts on flat road,
Car 1 drives at 20m/s,
Car 2 drives at 30m/s, then comes to a stop.
Car 1 drives directly into 2 and the two cars end up moving in the same direction at 10m/s.
How much energy did Car 1 LOSE in the collision?
How much energy did Car 2 GAIN in the collision?
Please explain or write out the problem. Thank you.
2006-12-06 05:14:56 · 3 answers · asked by hanana 2 in Science & Mathematics ➔ Physics
Car 1 drove at a constant 20 m/s, so the fact that it started on a hill doesn't matter - except that it saved some gas. Car 2 came to a stop before the collision, so the original 30m/s doesn't matter.
Car 1
before: KE = (1/2)*m2*(20m/s)^2,
after: (1/2)*m2*(10m/s)^2
Car 2
before: KE = 0,
after: KE = (1/2)*m1*(10m/s)^2
2006-12-06 06:36:40 · answer #1 · answered by sojsail 7 · 1⤊ 0⤋
lol no im donig your homework for u
2006-12-06 05:17:31 · answer #2 · answered by Anonymous · 0⤊ 1⤋
sorry, i really don't know but good luck!
2006-12-06 05:23:35 · answer #3 · answered by sorryna 4 · 0⤊ 0⤋