Question

A 2600 kg train car moving at 10m/s collides and sticks to a 2500 kg train car initially at rest. What is the final velocity of the 2 train cars?

Answer 1

Given data

*The given mass of the train car is m = 2600 kg

*The initial speed of the train is u = 10 m/s

*The second mass of the train car is M = 2500 kg

*The initial speed of the second train car is v = 0 m/s

The formula for the final velocity of the two train cars is given as

$mu+Mv=(m+M)V$

Substitute the values in the above expression as

$\begin{gathered} 2600\times10+2500\times0=(2600+2500)V \\ V=5.09\text{ m/s} \end{gathered}$

Thus, the final velocity of the two train cars is V = 5.09 m/s