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emmanuellugo40
05.02.2020 •
Physics
Arailway wagon of mass 20t is moving along a level track at 10km/h when it collides and couples together with a second wagon of mass 25t moving in the
same direction at 5km/h. if the two wagons couple together after the impact, what would be their common velocity?
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Ответ:
mv + mv = mv
plug in all the values
(20t)(10) + (25t)(5) = (45t)Vfinal
distribute everything
200t + 125t = 45t Vf
simplify
325t = 45t Vf
divide both sides by 45t
7.22 = Vf
So their final common velocity is 7.22km/h in the same direction as they were travelling before
Ответ:
Explanation:
states that the acceleration of an object increases with increased force and decreases with increased mass. The law also states that the direction in which an object accelerates is the same as the direction of the force.