Answer:
Explanation:
Momentum before collision = momentum after collision
If
m₁ = 300 kg
v₁= 10 m/s
m₂ =1000 kg
v₂ = 0 as the car was parked
momemum before collision =
m₁ v₁ + v₂ m₂= 3000kgm/sec
momentum after collision= m₁ v₃+ v₄m₂=
300v₃+15m/sx 1000kg
now from the law of conservation of momentum
momentum before collision= momentum after collision
3000kgm/s= 300v₃ +15000kgm/s
-15000+3000= 300v₃
-12000=300v₃
v₃= -40m/s
the velocity of truck after collision is 40m/s and the negative sign indicates that its a recoil velocity.
