A car of mass 1348kg moving with a velocity of 26m/s collides with a car os mass 674kg moving with a velocity of 21m/s in the same direction. after they collide the 674kg car moves with a velocity of 5.25m/s(adsbygoogle = window.adsbygoogle || []).push({});

What is the velocity of the 1348kg object?

M1 = 1348kg

M2 = 674kg

V1 = 26ms-1

V2 = 21 ms-1

Ptotalbefore = P1before + P2before

Ptotalbefore = m1before * V1before + m2before * V2before

Ptotalbefore = 1348*26 + 674*21

Ptotalbefore = 49202kgms-1

Ptotalbefore = Ptotalafter

Ptotalbefore = P1after + P2after

49202 – (674*5.25) = P1after

P1after = 45663.6

P1after = m1after * V1after

P1after = V1after

M1after

V1after = 45663.6

...................1348

V1after = 33.88ms-1

According to my answer car1 speeds up from 26m/s to 33.88m/s after the collision. im certain that is not right but cant see where i have gone wrong can any one help me please.

Thanks in advance

Tom

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Momentum concepts (help please)

**Physics Forums | Science Articles, Homework Help, Discussion**