A typical track spike shoe has a mass of 0159kg Adidas has j

A typical track spike shoe has a mass of 0.159kg. Adidas has just come out with a new shoe that has a mass of only 0.09kg. Estimate the reduction in peak force (N) that this new light shoe might provide for an elite male sprinter? Note the question asks for reduction so do not include a sign on your answer.( The answer is 32.016 just confused on how to get it)

Solution

force provided by typical track spike shoe

F = mg = 0.141 ( 9.8) = 1.3818 N

the reduction in peak force is

F = mg

= 0.098 ( 9.8)

=0.9604 N

the reduction in peak force i s

F = F- F\' = 1.3818 N-  0.9604 N= 0.4214 N