Question

a swimmer wades through water at a speed of 0.18 ms. the force of the water acting aganist his movement is 120N . cal. the power developed by the swimmer ?​

Answer 1

Answer:

Explanation:

We have to find out the power which is developed by the swimmer.

To obtain power (P), substitute 110 N for F and 0.22 m/s for v in the equation P = Fv,

P = Fv

= (110 N) (0.22 m/s)

= 24.2 N. m/s

= (24.2 N. m/s) (1 W/1 N.m/s)

= 24.2 W …… (2)

Rounding off to two significant figure, the power which is developed by the swimmer will be 24 W

Answer 2

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we know that,

★power = FV

F= 120

V= 0.18

$= > 120 \times 0.18$

$= > 21.6w$

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