Question
a railway freightbcar whose mass is 15 000kg & speed is 2.4m/s runs into a stationary freight car whose mass is 25 000kg. the 2 cars couple & roll off the track. what is the speed if the 2 cars as tey move together down the track? and how much kinetic energy is lost in the collision?
Answers
bobpursley
a. use conservation of momentum.
(m+M)V=m*2.4+M*0 solve for V.
Next,
lost KE= initial KE-final KE=1/2 m*2.4^2-1/2 (m+M)V^2
(m+M)V=m*2.4+M*0 solve for V.
Next,
lost KE= initial KE-final KE=1/2 m*2.4^2-1/2 (m+M)V^2
Related Questions
A railway track travelling along a level at 9 m/s collides with, and becoms coupled to a stationary...
A locomotive that has a mass of 6.4 x 105 kg is used to pull 2 railway cars. Railway car 1 has a ma...
A group of 4 rail cars with a total mass of 50,000kg moves at 3m/s at a stationary locomotives that...
Consider a stationary observer at a railway station who sees a passenger in a railway coach that is...