Homework Answers
car
m1 = 1000 kg u1 =
20 m/s
truck
m2 = 3000
kg u2 = 5
m/s
after collision
v1 = v2 = V
momentum before collision
Pi = m1*u1 + m2*u2
momentum afteer collision
Pf = (m1+m2)*v
from momentum conservation
Pf = Pi
v = ((1000*20)+(3000*5))/(1000+3000)
v = 8.75 m/s
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