Final answer:
The swimmer's work output per stroke is 144.0 Joules, and their power output with a stroke rate of 120 strokes per minute is 288 Watts. The stroke rate in a 2000m row is typically between 24 and 40 strokes per minute for competitive rowers.
Step-by-step explanation:
The question is asking about the work output in each stroke and the power output during a 2000m row. To calculate the work done in a single stroke by a swimmer exerting a force, we use the formula: Work = Force x Distance. Given that the swimmer applies an average horizontal backward force of 80.0 N over a distance of 1.80 m, the work per stroke would be:
Work = 80.0 N x 1.80 m = 144.0 Joules per stroke.
To find the power output, which is the rate at which work is done, we apply the formula: Power = Work x Stroke Rate. With a stroke rate of 120 strokes per minute, we convert this to strokes per second by dividing by 60 (since there are 60 seconds in a minute), and calculate the power output as follows:
Stroke rate = 120 strokes/minute / 60 = 2 strokes/second
Power = 144.0 J/stroke x 2 strokes/second = 288 Watts
This provides an estimate of the athlete's power output during a 2000m row. In actual practice, the stroke rate during a 2000m row varies, but competitive rowers often maintain a stroke rate between 24 and 40 strokes per minute depending on their strategy and fitness level.