Question

A billiard ball moves 18 meters southward, then 12 meters northward, and finally 8 meters southward. For this motion, what is the distance moved? _________________ What is the magnitude and direction of the displacement? _________________

Answer 1

Answer:

38m

14m South

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Explanation:

Distance (scalar quantity, no directions required) = Total length

= 18m + 12m + 8m = 38m

Diaplacement (Vector quantity, direction required) = Shortest distance between final and initial position

Let south be +ve

then: (18m - 12m + 8m) South [As it goes 18m south, then 12m north(opposite) and 8 m south again]

= 14m South