The 200 m free style women's swimming gold medal at Seol Olympic 1988 went to Heike Friendrich of East Germany when she set a new Olympic record of 1minute and 57.56 seconds. Assume that she covered most of the distance with a uniform speed. Calculate the average force of resistance offered by the water during the swim.

Open in App

Solution

$t = 1 m i n 57.56 s e c = 117.56 s e c .$

$p = 460 W, s = 200 m$

$p = \frac{W}{t}$

Work $W = p t = 460 \times 117.56 J$

Again, $W = F S$

$\Rightarrow F = \frac{W}{S}$

$= \frac{460 \times 117.56}{200}$

$= 270.3 N = 270 N$

Suggest Corrections

Similar questions

Q. The

200 m

free style women's swimming gold medal at Seol Olympic

1988

went to Heike Friendrich of Each Germany when she set a new Olympic record of

1

minute and

57.56

seconds. Assume that she covered most of the distance with a uniform speed and had to exert

460 W

to maintain her speed. Calculate the average force of resistance offered by the water during the swim.

Q. The US athlete Florence Griffith-Joyner won the 100 m sprint gold medal at Seoul Olympics in 1988, setting a new Olympic record of 10⋅54 s. Assume that she achieved her maximum speed in a very short time and then ran the race with that speed till she crossed the line. Take her mass to be 50 kg. (a) Calculate the kinetic energy of Griffith-Joyner at her full speed. (b) Assuming that the track, wind etc. offered an average resistance of one-tenth of her weight, calculate the work done by the resistance during the run. (c) What power Griffith-Joyner had to exert to maintain uniform speed?

The US athlete Florence Griffith - Joyner won the 100 m sprint gold medal at SeoulOlympic 1988 setting a new Olympic record of 10.54 s. Assume that she achieved her maximum speed in a very short-time and then ran the race with that speed till she crossed the line. Take her mass to be 50 kg. Assuming that the track, the wind etc. offered an average resistance of one tenth of her weight, calculate the work done by the resistance during the run.

She is aiming _______ winning a gold medal _______ the nest Olympic Games.

Q. If an Olympic athlete misses out on a gold medal by

1.2 cm

in the long jump. The distance he/she misses (in inches) is.

Join BYJU'S Learning Program

t=1 min 57.56 sec=117.56 sec. p=460 W,s=200 m p=Wt Work W=pt=460×117.56 J Again, W=FS ⇒ F=WS =460×117.56200 =270.3 N=270 N

$t = 1 m i n 57.56 s e c = 117.56 s e c .$

$p = 460 W, s = 200 m$

$p = \frac{W}{t}$

Work $W = p t = 460 \times 117.56 J$

Again, $W = F S$

$\Rightarrow F = \frac{W}{S}$

$= \frac{460 \times 117.56}{200}$

$= 270.3 N = 270 N$