Question

To generate tension in a muscle, a myosin molecule pulls on an actin filament with a force of 1.50 µN. if the actin filament moves at 3.56 nm/s, what is the power output P of this molecular motor? Use prefixes to express your answer.

Answer 1

Power in terms of Force and velocity is given by

$P=F\times v\\ F=1.5\mu N=1.5\times 10^{-6}N\\ v=3.56nm/s\\ v=3.56\times 10^{-9}m/s\\ P=1.5\times 10^{-6}\times3.56\times 10^{-9}\\ P=3.56fW$