The friction coefficient between an athlete's shows and the ground is $0.90$ . Suppose a superman wears these shoes and races for $50$ m. There is no upper limit on his capacity of running at high speeds. Find the minimum time that he will have to take in completing the $50$ m starting from rest.

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Solution

Initial velocity
$y = u = o \frac{m}{s}$
$a = 9 \frac{m}{s^{2}}$
$s = 5 m$
From $s = u t + \frac{1}{2} a t^{2}$
$50 = 0 + \frac{1}{2} a t^{2}$
$t = \frac{100}{9}$
$t = \frac{10}{3} s e c = 3.3 s e c$

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The friction coefficient between an athlete's shows and the ground is 0.90. Suppose a superman wears these shoes and races for 50m. There is no upper limit on his capacity of running at high speeds. Find the minimum time that he will have to take in completing the 50m starting from rest.

Initial velocityy=u=omsa=9ms2 s=5m Froms=ut+12at2 50=0+12at2 t=1009 t=103sec=3.3sec

The friction coefficient between an athlete's shows and the ground is $0.90$ . Suppose a superman wears these shoes and races for $50$ m. There is no upper limit on his capacity of running at high speeds. Find the minimum time that he will have to take in completing the $50$ m starting from rest.

Initial velocity
$y = u = o \frac{m}{s}$
$a = 9 \frac{m}{s^{2}}$
$s = 5 m$
From $s = u t + \frac{1}{2} a t^{2}$
$50 = 0 + \frac{1}{2} a t^{2}$
$t = \frac{100}{9}$
$t = \frac{10}{3} s e c = 3.3 s e c$