# Physics - Relative velocity

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A barge is heading directly across a river at35km/h while you are walking on the barge at 4km/h in the same direction as the barge is heading. The current is flowing downstream at 1.4km/h.
a) What is your velocity relative to the shore? (7.6km/h)
b) What would you velocity be relative to the shore if you were walking towards the shore you left? (1.5km/h)

• Physics - Relative velocity -

a) No of course not. If the barge is going 35km/hr whether you are walking or not, in still water, the relative velocity is 35km/hr
velocity relative to shore is the vector sum
velocity=sqrt((35+4)^2+1.4^2)

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