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 Δv?

Question

asked Oct 4, 2017 188k views

2 Answers

Wesley Van Opdorp · Answer 1 · 2017-10-08T10:13:49+0000

Answer:

+7 m/s

Step-by-step explanation:

$\Delta v$ (change in velocity) is defined as the difference between the final velocity and the initial velocity:

$\Delta v = v_f -v_i$

where:

v_f = 9 m/s is the final velocity

v_i = 2 m/s is the initial velocity

Substituting the numbers into the equation, we find

$\Delta v = 9 m/s - 2 m/s = +7 m/s$

So, the ball has increased its velocity by 7 m/s.