A ball is rolling down a hill. At one point near the top of the hill , its velocity is 2 m/s. Further down the hill, Its velocity is 9 m/s. what is ∆v? 9m/s 7m/s -7m/s -7m/s2? choose one
You want to know the difference between the two velocities, so you have to think 9 m/s - 2 m/s. The result is 7 m/s, the second option of your list. Hope that was helpful, have a great day!
