Science 3rd QE

• Static, and Kinetic - Two kinds of friction
• Friction - a contact force that serves to slow down a moving object or prevent motion altogether
• Static Friction - Prevents two stationary objects from sliding against each other
• Kinetic Friction - Exists when objects slide against each other, like in the case of moving machine parts.
• Uniform Circular Motion - The simplest type of circular motion
• Centripetal force - The net force that pulls the object toward the center of the circle
• Centripetal Acceleration - The acceleration of an object moving in a circle.
• Period - The time within which an orbiting body completes its movement in a circle
• Frequency - The reciprocal of period
• Hertz - the unit of frequency, equal to one cycle per second
• Orbital Speed - The speed of how fast an object is going around the circle.
• Distance - a measurement of how far an object is from another point
• Reference Point - Used to describe and measure the change in position
• Displacement - The change in position of an object with respect to its initial position
• Scalar Quantity - a quantity specifies only of magnitude/size, and distance
• Vector Quantity - Specifies both the magnitude and direction
• Energy - The capacity to do work
• Work - The measure of how a force is capable of moving an object, or in causing a displacement
• Mechanical energy - The energy of moving bodies
• KInetic, and Potential - The two types of mechanical energy
• Kinetic - The energy in motion
• Potential Energy - The energy of position or configuration
• Gravitational, and Elastic - Two types of Potential energy
• Gravitational Potential Energy - Energy stored because of elevation
• Elastic Potential Energy - Energy stored in a stretched spring or elastic object.
• Chemical Energy - energy stored in the bonds of chemical compounds.
• Radiant Energy - type of energy that travels in waves, like light from the sun or a lamp.
• Thermal Energy - Energy transferred by the movement of particles in a substance due to temperature change
• Sound energy - Made by Vibrations
• Electrical Energy - The energy stored in an electrical charge or in an electric current. Moving electrons
• Nuclear Energy - Energy released by the splitting of a large nucleus. Requires Fission, and Fusion
• Weight - Gravitational force acting on an object. 9.8m/s²