Mary needs to row her boat across a 50 m-wide river that is flowing to the east at a speed of 3.0 m/s . Mary can row with a speed of 3.0 m/s. If Mary rows straight north, where will she land?
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draw it out
you have one vector of 3.0 m/s E and one of 3.0 m/s N
and we know that the river is 50 m wide
so during her transit she will go 50 N and 50 E
they are at right angles
she will land 50 m E of where she would have landed if the water were still
you have one vector of 3.0 m/s E and one of 3.0 m/s N
and we know that the river is 50 m wide
so during her transit she will go 50 N and 50 E
they are at right angles
she will land 50 m E of where she would have landed if the water were still
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She will land 50 meters east of her starting point.