what is the reasonable estimate of the average kinetic energy of an athlete during a 100m race that takes 10s ? (please show the working aswell. hurry its my exam tomorrow !!! )

Question

anonymous · Answer

KE=0.5*m*v^2.

You know the average velocity (distance ÷ time).

Estimate an average mass for the athlete and plug it all in.

anonymous · Answer

the mass inst given

anonymous · Answer

isnt

anonymous · Answer

So make something up. About how much mass would an average athlete have?

anonymous · Answer

do what cliff said he seems to be the wisest out of anyone. just because thmass isnt given make an esatmated guess

anonymous · Answer

its an mcq question the options are 1) 40J 2)400J 3)4000J $)40000J

anonymous · Answer

Ah, this is like a Fermi, order-of-magnitude, problem. Yeah, just plug some reasonable numbers into that formula. As long as you're not off by a factor of ten in your estimate, you'll find it.

anonymous · Answer

found it thank !! btw i used my weight lol

anonymous · Answer

Cool. :-)