A boy and a girl both swim at 3.0m/s. They jump into a river 1.0km across, with a current of 2.0m/s [East].

a) The boy faces due north at all times. What is his velocity relative to the ground?

b)The girl swims straight across relative to the shore. What is her velocity relative to the ground?

c)How long (in minutes) does each take to cross the river?

Question

A boy and a girl both swim at 3.0m/s. They jump into a river 1.0km across, with a current of 2.0m/s [East].

a) The boy faces due north at all times. What is his velocity relative to the ground?

b)The girl swims straight across relative to the shore. What is her velocity relative to the ground?

c)How long (in minutes) does each take to cross the river?

beth12345 · Answer

The answers are...
a) 3.6m/s [34degrees E of N]
b) 2.2m/s [N]
c) 5.6 min, 7.5 min

I just don't know how to get them...

anonymous · Answer

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