4181612
Description
Flashcards by Lauren Jatana, updated more than 1 year ago
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Created by Lauren Jatana
almost 9 years ago
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| Question | Answer |
| What is a scaler and what is a vector? | scaler: only a magnitude vector: magnitude AND direction |
| What is 10 m/s? 1. Is it a scaler or a vector? 2. Is it speed or velocity? 3. What is the magnitude, direction and units of this measure? | 1. 10 m/s is a SCALER (because no direction was given to us) 2. It is SPEED, because velocity is a vector 3. Magnitude is 10, and there is no direction. Unit are in [meter]/[second] |
| How do I use sig digs? | ... |
| What is the law of energy? | Energy cannot be CREATED or DESTROYED. It can only be transformed from one type to another. |
| What is the equation for KINETIC energy? Do you know a good memory trick? | E = 1/2 m* v^2 (Remember E=m*c ^ 2?... from Einstein?) |
| What does the word kinetic mean? How would I increase something's KINETIC ENERGY? | 1. Kinetic = moving 2. If E = 1/2 m * V ^2, then if I increase "m" or "v" (especially v!)... then I increase the kinetic energy |
| What are the units to measure ENERGY? | J, joule |
| According to Kinetic Energy, what does a Joule really break down into for "units" ? | If E = 1/2 * m * v^2 Then [ J ] = [kg] * [m/s]^2 Which simplifies to [J] = [kg*m^2/s^2] |
| A soccer goaler catches and holds the fast-moving ball. What happens to the kinetic energy of the ball? The energy disappears? The energy is converted? | OF COURSE IT NEVER DISAPPEARS! Remember the "law of conservation of energy"... What form is the kinetic energy formed into? |
| What are the two rules to round to appropriate sig digs? | 1. add/sub: Round to least accurate number 2. multi/div: Round to least sig digs |
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