Force is defined as

Force can be defined as a push or a pull that changes or tends to change the state of rest or uniform motion of an object or changes the direction or shape of an object.

Speed is the distance traveled per unit of time. It is how fast an object is moving. Speed is the scalar quantity that is the magnitude of the velocity vector. It doesn't have a direction. A higher speed means an object is moving faster.

Theweightof an object is the force of gravity on the object and may bedefinedas the mass times the acceleration of gravity, w = mg.

Thrust is a reaction force described quantitatively by Newton's third law. When a system expels or accelerates mass in one direction, the accelerated mass will cause a force of equal magnitude but opposite direction on that system.

Atmospheric pressure is defined as the force per unit area exerted against a surface by the weight of the air above that surface.

One newton is the force needed toaccelerateonekilogramof mass at the rate of onemetre per second squaredin direction of the applied force.