Question

Two objects, one with a momentum of 10 kg m/s and another with a momentum of 20kg m/s are headed in the same direction. If they collide and stick together their totalmomentum is

Answer 1

Given data:

* The initial momentum of one object is 10 kgm/s.

* The initial momentum of second object is 20 kgm/s.

Solution:

According to the law of conservation of momentum, the final momentum of the system is sum of the initial momentum of both the objects,

`p_f=p_1+p_2`

where p1 is the iniitial momentum of the first object and p2 is the initial momentum of the second object,

Substituting the known values,

`\begin{gathered} p_f=10+20 \\ p_f=30\text{ kgm/s} \end{gathered}`

As both the objects are moving towards the same direction,

Thus, the momentum of both the objects are added together to get the total initial momentum of the system.

Hence, the momentum after the collision is 30 kgm/s in the same diection