Asked by angel
A 40-kg skater travelling at 4m/s overtakes a 60-kg skater traveling at 2m/s in the same direction and collides with him.
a. If two skater remains in contact, what is their final velocity?
b. How much kinetic energy is lost?
a. If two skater remains in contact, what is their final velocity?
b. How much kinetic energy is lost?
Answers
Answered by
oobleck
(a) conserve momentum:
40*4 + 60*2 = (40+60)v
(b) calculate KE = 1/2 mv^2 before and after the collision
40*4 + 60*2 = (40+60)v
(b) calculate KE = 1/2 mv^2 before and after the collision
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