Question

Two bodies each of mass 1 kg are moving in a straight line but in opposite direction with the same velocity of 2 m/s. They collide with each other and stick together to each other after collision. What is the common velocity of these bodies after collision?

Answer 1

For diagram refer the attachment

Here From momentum conservation

we get

$p_{initial}=p_{final}$

$m_{1}v_{1}+m_{2}v_{2}=M^{'}V^{'}$

given bodies are travelling with same speeds but in opposite direction

Also that Mass of each body is same

Also Bodies stick after collision hence Final mass

$M^{'}=1+1=2kg$

$1(2)i +1(2)(-i)=2(V^{'}$

$2i-2i =2V^{'}$

From here it is cleart that

$V^{'}=0 ms^{-1}$

Answer 2

Answer:

I hope it will help you and its a question of physic not of math