(i) Power = mg × velocity, g = 10 m s–2
= 1/1000 ×10× 0.5W 1000 = 0.5 W
=0.5/100 W = 5 x 10-3
(ii) Power = 250/1000 ×10× 0.5 W
= 1/ 4x10x0.5 = 1.25 W Hence, the power with which the squirrel is climbing is much higher than that of a butterfly flying.