Q. 225.0( 4 Votes )

The 200 m free st

Answer :

Distance covered, d= 200 m

Time in which she covered the 200m distance, t = 1minute 57.56 seconds = 117.56 seconds

Power exerted in this time period = 460 W or J/s

Work done in covering this distance with given conditions, W = Power × Time

= 460 × 117.56

= 54077.6 J

Also, this work done W = Force × distance covered

Magnitude of this force of resistance = W/d

= 54077.6/200

= 270.388 N

≈ 270 N

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