Question

A trolley of mass 1000 kg moving at 10 m/s collides and hooks onto another identical trolley at rest. What is the velocity of both the trolleys together?

Answer 1

and why?

Answer 2

use conservation of angular miomentum

Answer 3

reply if you got it

Answer 4

is the answer 5 m/s? @nkaadi1995

Answer 5

yes, the total momentum remains the same (1000)(10) = (2000)(5)

Answer 6

why does the total momentum remain the same? @douglaswinslowcooper

Answer 7

there is conservation of momentum if there is no external force acting on the system. The collision involves only internal forces.