Question

Compare the power at which each of the following is moving upwards against the

force of gravity? (given g = 10 m s–2)

a) a butterfly of mass 1.0 g that flies upward at a rate of 0.5 m s-1

.

b) a 250 g squirrel climbing up on a tree at a rate of 0.5 m s-1​

Answer 1

power=mg×velocity, g=10ms^−2

=1/1000×10×0.5 W

= 0.5/100 =5×10^−3 W