Calculate work done by currents. For 3 (a first sailor b) second sailor c) not e

Question

Calculate work done by currents.

For 3 (a first sailor b) second sailor c) not enough information

Two competitive sailors want to race to reach the target at the point C = (9,8) .They will launch from the same spot A = (0,0) and follow two different paths. The first sailor will reach C by travelling through the spot B1 = (9,0) while the other sailor will reach the target through the spot B2 = (0,8). Assume that both sailors will sail in straight lines and that they have the same power. Assume also they experience a force caused by the currents defined as: F (x, y) = (x-y, y) Calculate the work done by the currents affecting the first sailor. Calculate the work done by the currents affecting the other sailor. From above, can you decide which sailor will win?

Explanation / Answer

1) 161.67 J

2) 530.67 J

3) first sailor will win ( time = work done / power,,....here power is contant)

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