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avenkat0
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Homework Statement
Car A has a greater mass than car B. Let:
- KA = the kinetic energy of car A
- KB = the kinetic energy of car B
- pA = the magnitude of the momentum of car A
- pB = the magnitude of the momentum of car B
- vA = the speed of car A
- vB = the speed of car B
a) If car A and car B have the same kinetic energy (KA = KB), then
Homework Equations
p=mv
Ke= .5(m)(v^2)
The Attempt at a Solution
I tried to set up a situation:
Car A- 10 kg Car B- 5kg Ke=20 J
.5(10)(v^2) = 20 .5(5)(v^2)=20
v= 2 m/s v= 2.828 THEREFORE Vb > Va
Pa=10(2) = 20 Pb=5(2.828) THEREFORE Pb < Pa
But the selection Pb<Pa and Vb>Va is wrong
Is there a flaw in my reasoning
thank you for your help
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