A 20 metric ton train moves toward the south at 50 m/s. What speed must it travel to have two times its original momentum?
Change in momentum = mass(FinalVelocity - InitialVelocity)
The Attempt at a Solution
so I thought you would simply times 50 by 2 and get 100 to be the answer, but thats not right. First question is do you have to convert 20 metric tons to kilograms?