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Question #8cfd6

1 Answer

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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