terms

• A force is a push or pull on an object that causes it to move or change its shape.
• Mass is a measure of the amount of substance in a body
• Weight is the gravitational force acting on a body
• Pressure is the force acting perpendicularly on per unit area of contact
• Energy is the capacity to do work
• The Principle of Conservation of Energy:

  Energy cannot be created or destroyed.

  Energy can be transferred from one store to another.

  The total energy of an isolated system is constant
• Work done is the product of a force and the distance moved in the direction of the force.
• Weight is a gravitational force acting on a body
• Normal contact force is the force exerted on a body by a surface in contact with it
• Friction occurs when two objects rub against each other
• Temperature is a measure of the average kinetic energy per particle
• Conduction is the transfer of thermal energy without the physical movement of the medium
• Convection is the transfer of thermal energy by the movement of the particles in a fluid, due to density differences
• Radiation is the transfer of thermal energy in the form of infrared radiation without the need of a medium
• Potential difference is the work done per unit charge in driving charges through an electrical circuit component
• Current is the rate of flow of electric charge
• Resistance is the measure of how much a component opposes the flow of electric current
• Power is the amount of electrical energy converted to other forms of energy per unit time