Question

The hummingbird shown here must beat its wings repeatedly to hover over flowers and drink nectar. What force does the beating of the hummingbird’s wings overcome?

A) entropy
B) gravity
C) inertia
D) momentum

Answer 1

B) gravity

When the hummingbird is in mid-air, the only force acting on it is gravity. The wings of the hummingbird push up to counteract the gravity and keep the bird in the air.