An object of mass 2kg moving with a velocity 3ms^-11 collides head-on with another object of mass 1kg moving in the opposite direction with a velocity of 4ms^-1. If the objects stick together after collision, calculate their common speed.

chimzzy01

3 months ago

since the objects STICK TOGETHER, this is a PERFECTLY INELASTIC COLLISION,so we use CONSERVATION OF MOMENTUM.
THAT IS:
m1-m2=(m1+m2)v

so the picked answer is correct, which is 0.67m/s

Yeenkhar

3 years ago

2*3 +1*4=10 and 10/4=3.33

somyqueen

1 year ago

The formula, its should be addition not subtraction

Stephenieeee

4 years ago

but2*3-1*4=20 and 20=3 so therefore V=3/20=0.15