m1 = 1200
kg                 Â
m2 = 1500 kg
speeds before collision
u1x = 20
Km/h                 Â
u1y = 0
u2x =
0Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
u2y = ?
speeds after collision
v1x = v2x = V*cos57
v1y = v2y = V*cos57
initial momentum before collision
Pix = m1*u1x + m2*u2x
after collision final momentum
Pfx = m1*v1x + m2*v2x
from moentum conservation
total momentum is conserved
from momentum conservation total momentum is
conserved
Pfx = Pix
m1*u1x + m2*u2x = m1*v1x + m2*v2x
(1200*20) + (1500*0) =
(1200+1500)*v*cos57.....(1)
v = 16.32 m/s
Pfy = Piy
m1*u1y + m2*u2y = m1*v1y + m2*v2y
(1200*0) + (1500*u2y) =
(1200+1500)*16.32*sin57.....(1)
u2y = 24.64 km/h <<--answer
