# Answer on Mechanics | Relativity Question for logan

Question #32590

a cyclist and their bike have a combined mass of 94kg and a kinetic energy of 2303J. what is the speed of the cyclist?

Expert's answer

As we know, kinetic energy is defined by the following formula:

Ek=mv^2/2

where m-mass, v-velocity

whence magnitude of velocity (which is called speed) equals v=sqrt(2*Ek/m)

So in our case we have:

v=sqrt(2*2303/94)=7 m/s

Ek=mv^2/2

where m-mass, v-velocity

whence magnitude of velocity (which is called speed) equals v=sqrt(2*Ek/m)

So in our case we have:

v=sqrt(2*2303/94)=7 m/s

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