Question

if a 75kg runner can accelerate from standing start to a speed of 10m/s in 3 s, how much power is generated

Answer 1

can you please or somebody write a soulution over here

Answer 2

please, keep in mind that work done by the runner is equals to the kinetic energy accumulated by that runner, so
work=Kinetic energy=
\[\frac{ 1 }{ 2 }mV ^{2}=\frac{ 1 }{ 2 }75*10^{2}=3750Joule\]
by definition, power is work over time, so:
power=
\[=\frac{ 3750 }{ 10 }=375Watts\]
do you agree?

Answer 3

oops...sorry:
power=
\[=\frac{ 3750 }{ 3 }=1250Watts\]
do you agree?