Physics lovers....here's another one?

1 ⤊

Physics lovers....here's another one?

Two railroad cars, each of mass 6500 kg and traveling 85 km/h in opposite directions, collide head-on and come to rest. How much thermal energy is produced in this collision?

Of course, answer should be in J.

2007-02-17 03:41:01 · 4 answers · asked by Jessie L 2 in Science & Mathematics ➔ Physics

4 answers

We may assume that entire kinetic energy of both cars is converted into thermal energy.

Then
velocity v=85 km/h = 23,61 m/s,

thermal energy W=2*KE=2*(mv^2)/2=mv^2=
=6500*23,61*23,61=3623308,65 J.

2007-02-17 04:59:40 · answer #1 · answered by TJn 2 · 1⤊ 0⤋

None

2007-02-17 12:10:08 · answer #2 · answered by Anonymous · 0⤊ 2⤋

553500J

2007-02-17 12:12:10 · answer #3 · answered by Ashwin M 3 · 0⤊ 2⤋

HUH ????

2007-02-17 11:44:22 · answer #4 · answered by tooldaddy2003 5 · 0⤊ 1⤋