Thrust

Definition

Thrust is the force applied to an object to move it in a specific direction, typically produced by engines or propulsion systems. It is an application of Newton's Third Law, where every action has an equal and opposite reaction.

5 Must Know Facts For Your Next Test

1. Thrust is directly related to Newton's Third Law: for every action, there is an equal and opposite reaction.
2. The magnitude of thrust can be calculated using the equation $F = ma$, where $m$ is mass and $a$ is acceleration.
3. In aerospace engineering, thrust is generated by engines expelling gas at high speeds.
4. Thrust must overcome drag and weight for an object to accelerate forward.
5. The units of thrust are typically Newtons (N) in the metric system.

Review Questions

• What law of motion explains the concept of thrust?
• How does thrust relate to acceleration and mass?
• What are the primary forces that thrust must overcome for flight?

Related terms

Newton's Third Law:

States that for every action, there is an equal and opposite reaction.

Drag: A force opposing the motion of an object through a fluid (like air or water).

Lift:

An aerodynamic force that acts perpendicular to the relative flow of fluid around a body.