Answer:
Step-by-step explanation:
truck mass is hard to read--it looks like 3x10⁴ kg? If so, here's my answer:
Positive direction is the direction of the TRUCK before the collision
Momentum = P = mv
(3x10⁴ kg)(10 m/s) - (1200 kg)(25 m/s) = (3x10⁴ kg + 1200 kg)v
total momentum before the collision = total momentum after the collision
270000 kg·m/s = (31200 kg)v
v = 270000 kg·m/s / 31200 kg = 8.65 m/s
The car and truck stuck together as one mass moves in the direction the truck was moving before the collision.