Question

A 4.0 kg mass is moving to the right at 3.0 m/s. An 8.0 kg mass is moving to the left at 2.0 m/s. If after collision the two masses join together, what is their velocity after collision?

Answer 1

$ASSALAMUALAIKUM$

GIVEN VALUES:-
M1= 4kg, M2= 8kg
V1= 3m/s, V2= 2m/s

As per given that, after collision two
masses join together then the collision will be inelastic

SOLUTION:-

FORMULAE:-
$V= M1V1 + M2V2 / M1 + M2$

V= 4*3+3*2 / 4+8
12+6 / 12

28 / 12


$=2.33$

$INSHAALLAH it will help you!$

Answer 2

GIVEN VALUES:- 
M1= 4kg, M2= 8kg 
V1= 3m/s, V2= 2m/s

As per given that, after collision two
masses join together then the collision will be inelastic 

SOLUTION:- 

FORMULAE:- 
V= M1V1 + M2V2 / M1 + M2V=M1V1+M2V2/M1+M2

V= 4*3+3*2 / 4+8
12+6 / 12

28 / 12


=2.33=2.33