Propulsion

The video explains how propulsion systems, like jet engines, generate forces. When a propulsion system creates an accelerating force, it also generates an equal and opposite balancing force. Specifically, a jet engine pushes air and exhaust gases backward, which in turn exert an equal and opposite force on the plane, propelling it forward.

What is a key characteristic of any propulsion system?

• It requires no fuel to operate.

• It produces an accelerating force and a balancing force.

• It can only be used in space.

• It only produces a forward force.

How does a jet engine interact with the air?

• It stops air from moving.

• It cools the air around it.

• It produces a force on the air and exhaust gases.

• It pulls air in and holds it.

What happens to the exhaust gases in a jet engine?

• They are pushed backward.

• They are pushed forward.

• They are absorbed by the engine.

• They remain stationary.

What effect does the backward push of exhaust gases have on the plane?

• It has no effect on the plane.

• It slows the plane down.

• It pushes the plane forward.

• It causes the plane to spin.

What is the relationship between the forces exerted by the jet engine and on the plane?

• One is much stronger than the other.

• They are both in the same direction.

• They are equal and opposite.

• They are unrelated.