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# Physical Science

### Final Study Guide

Know the Definition of Motion a change in the position of an an object compared to another object
Know the label for speed mph, m/s, km/min
Know what acceleration due to gravity is the change in velocity caused by a gravitational force
Know the definition of acceleration change in speed over a certain time
Know the definition of velocity speed in a given direction
Be able to calculate acceleration using Newton’s 2nd Law What is the acceleration of a 10 kg object with a force of 200 N? Answer: 20 m/s^2 Formula: Acceleration= force divided by mass
Know the formula for Newton’s Second Law states that acceleration depends on the objects's mass and the amount of net force applied to it
Know the formula for newton's third law state that for every action there is an equal and opposite reaction
Know that the more mass an object has, the greater the speed and acceleration Example: Bowling ball will have more momentum than a ping pong ball because it has more mass
Know the definition of law of conservation of energy Energy that stays constant
Know the definition of a wedge and compound machine an object with at least on slanting side ending in a sharp edge, which cuts material apart a machine consisting of two or more simple machines operating together, as a wheelbarrows consisting of a lever, axle, and wheel
What is power measures in? Power is measured in watts
Example: a sound wave will continue travelling until its energy is “lost” or transferred into another type Waves travel as long as they have energy.
What happens when the wave is slow? The slower the wave, the longer the wavelength
Created by: kweenkeke