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.
Answer:
Give up.
Explanation:
Physics is horrible.
And that's the cold hard truth. :(
The initial velocity of the train is 12.56 m/s.
<h3>
Initial velocity</h3>
The initial velocity of the train can be determined by using the first kinematic equation as shown below;
v = u + at
u = v - at
where;
- v is the final velocity = 110 km/h = 30.56 m/s
- u is the initial velocity
u = 30.56 - (36 x 0.5)
u = 12.56 m/s
Thus, the initial velocity of the train is 12.56 m/s.
Learn more about initial velocity here: brainly.com/question/19365526