Physics Flashcards
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| 8953944828 | Speed | Distance divided by Time. ALSO: A scalar quantity with units of m/s. | 0 | |
| 8953944829 | Acceleration | Change in Velocity divided by Time. ALSO: A vector quantity with units of m/s/s. ALSO: The slope of a Velocity vs Time graph. | 1 | |
| 8953944830 | Net Force | Mass x Acceleration. ALSO: The vector sum of all forces acting on an object. | 2 | |
| 8953944832 | Work | Force x Distance. ALSO: The amount of energy given to an object when you push it or lift it through a distance. | 3 | |
| 8953944833 | Weight | Mass x Acceleration due to Gravity. | 4 | |
| 8953944834 | Potential Energy | Mass x Acceleration due to Gravity x Height. | 5 | |
| 8953944835 | Kinetic Energy | 1/2 x Mass x Velocity^2 | 6 | |
| 8962634494 | Thermal Energy | The type of energy that is due to the kinetic energy of individual molecules that make up a substance. Related to heat and temperature. Often caused by friction. | 7 | |
| 8953944839 | Acceleration due to Gravity | -10 m/s/s (on Earth). | 8 | |
| 8956718695 | Controlled variable | Something that is NOT changed in an experiment. | 9 | |
| 8956725279 | Independent variable | Something that is determined by the experimenter. Goes on the x-axis of a graph. | 10 | |
| 8956756895 | Dependent variable | Something that is measured to see if it is affected by the experiment. Goes on the y-axis of a graph. | 11 | |
| 8956769434 | Velocity | Slope of a Position vs Time graph. ALSO: Displacement divided by Time. ALSO: A vector quantity with units of m/s north (or south, etc). | 12 | |
| 8956779206 | Displacement | How far away you are from your starting point. | 13 | |
| 8962583538 | Reference point | "Zero" on a number line. | 14 | |
| 8956786422 | Inertia | Resistance to change in motion. Measured by an object's mass. | 15 | |
| 8956790389 | Free fall | A state of motion where an object is under the influence of only one force: Gravity. (No friction or air resistance). Objects in this state experience an acceleration of -10 m/s/s (on Earth). | 16 | |
| 8956818628 | Power | Work divided by Time. ALSO: The amount of energy used each second. Has units of Watts. | 17 | |
| 8956892417 | Scalar | A quantity with only a magnitude. Examples: Speed (55 mph), Distance (12 km), Energy (500 J) | 18 | |
| 8956900605 | Vector | A quantity with magnitude AND direction. Examples: Velocity (30 m/s north), Displacement (-45 meters), Force (35 N left), Momentum (12 kg m/s right) | 19 | |
| 8956925386 | Newton's First Law | A Law that says "Objects at rest will stay at rest, and objects in motion will stay in motion at a constant velocity, UNLESS acted upon by an unbalanced force." | 20 | |
| 8956933289 | Newton's Second Law | A Law that says "The acceleration of an object is directly proportional to the net force, and inversely proportional to the mass." As an equation: a = Fnet / m | 21 | |
| 8956942154 | Newton's Third Law | A Law that says "Every action force has an equal and opposite reaction force." | 22 | |
| 8956953648 | Law of Conservation of Energy | A Law that says "Energy cannot be created or destroyed, it can only change form." ALSO: The total energy of an isolated system remains constant. | 23 | |
| 8956978250 | Law of Conservation of Momentum | A Law that says "The total momentum of a system remains constant in the absence of external forces." | 24 | |
| 8962537371 | Elastic collision | An interaction where two objects bounce off each other. Both total momentum and kinetic energy are conserved. Example: Billiard balls. | 25 | |
| 8962542359 | Inelastic collision | An interaction where two objects stick together. Total momentum is conserved, but kinetic energy is NOT conserved because it is transformed into thermal energy. Example: Cars crashing. | 26 | |
| 8962550452 | Joule | The metric unit for work and energy. | 27 | |
| 8962555481 | Watt | The metric unit for power. Equal to 1 Joule per second. | 28 | |
| 8962558725 | Newton | The metric unit for force. | 29 | |
| 8962568897 | Kilogram | The metric unit for mass. | 30 | |
| 8962589915 | Force of Friction | The force that always acts opposite the direction of motion (or attempted motion). | 31 | |
| 8962592941 | Normal force | The force that always acts perpendicular to a surface, preventing two objects from passing through each other. | 32 | |
| 8962595544 | Equilibrium | An object in _________ is experiencing balanced forces. It will therefore stay at rest or move at a constant velocity. | 33 | |
| 8962605102 | Free Body Diagram | A diagram where an object is represented by a box, and all forces acting on the object are represented by arrows. | 34 | |
| 8962607300 | Coefficient of friction | A number with NO UNITS representing the strength of friction acting between two objects. A small number = slippery surfaces. A large number = sticky/rough surfaces. | 35 | |
| 8962622170 | Pendulum | A mass that is free to swing back and forth. Total energy is conserved, but is transformed between PE at the highest point and KE at the lowest point. | 36 |