The rate of change in speed or direction.
A surface designed to produce lift from the movement of air over it.
The weight of the air in a given space. The more air, the higher the pressure; the less air, the lower the pressure.
The amount of space taken up by a flat surface.
The upward force exerted when an object is immersed in a fluid. This force is equal to the weight of fluid displaced by the object.
Items carried by a vehicle.
The process of converting fuel into energy, often by burning.
Air that has been squeezed into a small space, creating high pressure.
The amount of mass per unit volume.
The combination of all the forces that slow something down as it moves through a liquid or a gas.
Forcefully pushing or pulling matter out.
The ability to do work. It can come in many forms, including electrical, heat, mechanical (moving parts), and potential (stored energy).
A push or a pull.
The force that tends to slow down moving objects that are touching.
A form of matter that has a variable shape and volume. At room temperature, air is a gas.
The force of attraction between two masses. The force that attracts objects toward the center of the Earth.
The tendency of an object to resist a change in motion.
A wind that hits a vehicle from the front, usually slowing it down.
Powered by expanded or compressed liquids.
A flat surface that is slanted, like a ramp.
A stiff rod or plank that rotates around a fixed point, or fulcrum when an input force is applied. One example is a see-saw.
The act of suspending something in midair, against gravity, without any visible external force or contact.
To move upwards.
A form of matter that has a defined volume and variable shape. At room temperature, water is a liquid.
The ability to be affected by a force called magnetism, sometimes caused by a flow of electricity.
The amount of matter that a physical object contains.
The benefit created by a machine that enables people to do work while using less force.
The smallest unit of a compound that can exist by itself and retain all its chemical properties.
Newton's Laws of Motion
The three laws of motion:
- An object at rest remains at rest. An object in motion remains in motion unless acted on by an outside force.
- A force is acting on an object causes an acceleration. Force = mass multiplied by acceleration
- With every force there is an equal, but opposite, force.
Powered by expanded or compressed air.
The amount of work done in a certain amount of time (Power = Work divided by Time).
The force applied to an area, divided by the size of the area. Pressure can be applied to solids, liquids, or gases.
Pounds per Square Inch: One way to measure pressure. 14.7 psi = air pressure at sea level.
A simple machine consisting of a rope running over a groove in a wheel. Pulling on the rope changes the direction of the lifting force. A pulley, or system of pulleys, make it easier to lift heavy loads by applying less force over greater distances.
A piece of cloth cut to various sizes and shapes. A sail is designed to catch and use the force of wind to propel a vehicle.
A cylinder surrounded by an inclined plane that spirals from top to bottom.
Any device that requires the application of a single force to o work. Simple Machines are tools used to make work easier.
A form of matter that has a definite shape and volume. At room temperature, wood is a solid.
How fast an object is moving.
The outside of any solid or liquid.
The unstable motion of a liquid or a gas.
An inclined plane with either one or two sloping sides that converts motion in one direction into a splitting motion.
Wheel & Axle
A round object or disk revolving around a central axis.
The energy transferred by a force to a moving object (Work = Force multiplied by Distance).