Question #8cfd6

1 Answer
Nathan L.
Jul 5, 2017

#14# #"m"#

Explanation:

We can treat the hill's incline as perfectly straight so that the ball rolls in one dimension.

If it traveled #14# #"m"# uphill, and then #28# #"m"# downhill, the displacement from the starting point is

#14# #"m"# #- 28# #"m"# #= color(red)(-14# #color(red)("m"#

The magnitude of this displacement is #color(blue)(14# #color(blue)("m"#, because a magnitude is always a positive quantity.

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