G Model Trains
Please look at this math/science question i need help!?
A 500 g Model Train car traveling at 0.8 m/s collides with a 300 g stationary car. The cars hook up and move off down the track together. How fast Are they going? could you please help me answer this question
thanks
Conservation of momentum (velocity times mass). (m1)(v1)=(m2)(v2). The 1 and 2 represent time before the collision and the time after the collision respectively. m1=500g, v1=.8m/s, m2=500g+300g=800g. So, (500g)(.8m/s)=(800g)(v2). v2=.5m/s
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