Question

A 16 kg mass travelling to the right at 5 m/s collides with
a 4 kg mass travelling to the left, also at 5 m/s. When
the masses collide, they stick together and move along
the same line as before.
Before the collision:
a What is the momentum of the 16 kg mass?
b What is the momentum of the 4 kg mass?
c What is the total momentum of the masses?
After the collision:
d What is the total momentum of the masses?
e What is the velocity of the masses?​

Answer 1

Answer:

a)p=mv

=16×5

=80kgm/s

b)4×5

=20kgm/s

c)80+20=100kgm/s

d)100kgm/s(law of conservation of momentum)

e)total p=(m1+m2)×v

100=(16+4)v

v=100÷20

v=5m/s