Question

Consider a system to be two train cars traveling toward each other. What is the total momentum of the system before the train cars collide? ____kg • m/s What must the total momentum of the system be after the train cars collide? ____ kg • m/s

Answer 1

Answer:

The total momentum of the system before the collision is 36900 kg m/s.

The total momentum of the system after the collision is 36900 kg m/s.

Explanation:

Given that,

Consider a system to be two train cars traveling toward each other.

Suppose, Two train cars approach each other, one of mass 113000 kg traveling at 1.20 m/s, the other of mass  75000 kg traveling at 2.30 m/s.

We need to calculate the momentum of train

Using formula of momentum

$p=mv$

Where, m = mass

v = speed

Put the value into the formula

$p=113000\times1.20$

$p=135600\ kg m/s$

We need to calculate the momentum of car

Using formula of momentum

$p=mv$

Put the value into the formula

$p=75000\times2.30$

$p=172500\ kg m/s$

We need to calculate the total momentum of the system before the collision

Using momentum of train and car

$p_{total}=p_{c}-p_{t}$

Put the value into the formula

$p_{total}=172500-135600$

$p_{total}=36900\ kg m/s$

We know that,

Momentum is always conserved in collision.

So, The total momentum of the system after the collision will be same.

Hence, The total momentum of the system before the collision is 36900 kg m/s.

The total momentum of the system after the collision is 36900 kg m/s.

Answer 2

Answer:

The both are 1,600 Hope it helped :DD