a. Kinetic Energy
b. Mechanical energy and momentum
c. momentum
d. neither mechanical energy nor momentum is conserved
Please help me with this!! I am stuck!!
2006-07-26 17:55:46 · 11 answers · asked by JK6969 1 in Science & Mathematics ➔ Physics
e. gasoline.
2006-07-26 18:00:00 · answer #1 · answered by Jim T 6 · 1⤊ 0⤋
Mechanical energy implies potential as well as kinetic energy.
Only in the case of ideal elastic collision, the kinetic energy is conserved. In general case the mechanical energy is conserved.
And in any collision the momentum is always conserved. Therefore, answer ‘b’ is correct. In answer ‘a’ and ‘c’ one part is missing. Answer‘d’ is wrong.
2006-07-27 04:58:46 · answer #2 · answered by Pearlsawme 7 · 0⤊ 0⤋
Answer is b. Both Mechanical Energy and Momentum
2006-07-27 01:07:33 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Kinetic Energy is not conserved because a lot of energy goes into damage to the cars.
Momentum is definitely conserved.
I'm not sure about Mechanical energy.
2006-07-27 00:59:46 · answer #4 · answered by Michael M 6 · 0⤊ 0⤋
A. cant be it cause kinetic energy is only when the object is moving and mechanical energy is due to the objects momentum which also can get lost due to collission so my guess would be none.
D final answer 90% sure
2006-07-27 01:01:02 · answer #5 · answered by Anonymous · 0⤊ 0⤋
C. Momentum
In a collision what is conserved? Momentum. Its a non elastic collision. Thus only Momentum is conserved. Energy is not conserved in this case.
2006-07-27 04:38:29 · answer #6 · answered by Vicente 6 · 0⤊ 0⤋
Momentum
2006-07-27 01:06:38 · answer #7 · answered by EE 2 · 0⤊ 0⤋
I'm pretty sure it's D.
All energy would be completely expended in deforming the metal of the cars and spent oposing the other car's momentum. Whatever energy used to get the cars moving would be gone once stopped.
2006-07-27 01:04:37 · answer #8 · answered by Anonymous · 0⤊ 0⤋
'A' and 'D' are effectively the same answer, so that leaves 'B' and 'C' as possibles. Mechanical energy and momentum would not both be conserved, so that leaves 'C' as the only possible answer, if the question isn't flawed.
2006-07-27 01:03:37 · answer #9 · answered by rumplesnitz 5 · 0⤊ 0⤋
Think of the thermodynamics involved. There is a lot of damage, noise, separated parts, flying parts, broken glass. The entropy of the system increases enormously. Each piece of torn metal has absorbed energy to create the cut.
Therefore the answer is partly yes and partly no for all of the options you list.
2006-07-27 03:38:34 · answer #10 · answered by andyoptic 4 · 0⤊ 0⤋
c
2006-07-27 01:00:05 · answer #11 · answered by sportsmess 3 · 0⤊ 0⤋