A runner of mass can exert a maximum horizontal backward push of on the track without…

PHYSICS · Single correct · CBSE · Physics · Laws of Motion · Laws of Motion

Problem

A runner of mass

50\,\text{kg}

can exert a maximum horizontal backward push of

300\,\text{N}

on the track without slipping. The coefficient of static friction between shoe and track is

0.60

on a dry day and

0.25

on a wet day. Take

g = 10\,\text{m}\,\text{s}^{-2}

. What is the ratio of the maximum horizontal acceleration possible on the dry track to that on the wet track? (a)

2.0

(b)

1.0

(c)

2.4

(d)

3.0