A hummingbird is hovering motionless beside a flower. The blur of its wings shows that they are rapidly beating up and down. If the air pushes upward on the bird with a force of 0.25 N, what is the force exerted on the air by the hummingbird? If the force of the bird on the air is downward, enter a negative value and if it is upward, enter a positive value.

Question

Brutus

Physics

19 September, 19:04

A hummingbird is hovering motionless beside a flower. The blur of its wings shows that they are rapidly beating up and down. If the air pushes upward on the bird with a force of 0.25 N, what is the force exerted on the air by the hummingbird? If the force of the bird on the air is downward, enter a negative value and if it is upward, enter a positive value.

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Answers (1)

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Galvan · Answer 1

-0.25 N

Explanation:

We are given that a humming bird is hovering motionless beside a flower.

Force applied on bird by air=0.25 N

We have to find the force exerted on the air by the humming bird.

We are given that bird is motionless

Then, force applied on the bird by air = Force applied on the air by bird (Newton's third law)

Therefore, force applied on the bird=0.25 N.

It is downward force due to gravity. Hence, the force applied on air by bird=-0.25 N