4552866
Description
Flashcards by Caroline McLean, updated more than 1 year ago
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Created by Caroline McLean
almost 10 years ago
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| Question | Answer |
| Formula for an unbalanced Force | f = ma |
| Formula for acceleration | a = (v-u) / t |
| Formula for momentum | p = mv |
| Formula for impulse | F = mv - mu / t |
| Formula for Hooke's law | F = -kx |
| The last point at which it obeys Hooke's law | Limit of proportionality |
| The last point at which the object will return to it's original length when the force is removed | Elastic limit |
| The point at which the structural integrity of the material breaks down and permanently deforms | Yield point |
| Unit for force | Newton (N) |
| Vectors | quantity that is described by both size (distance) and direction |
| Scalers | quantity that is only described by magnitude (e.g. temperature) |
| unit for acceleration | m/s^2 |
| definition of acceleration | the rate of change of speed |
| Newton 1 | An object at rest remains at rest and an object in motion remains in motion in a straight line, at a steady speed unless acted upon by an unbalanced force |
| Newton 2 | f = ma |
| Newton 3 | If object A exerts a force on object B, then object B exerts an equal and opposite force on object A |
| definition of terminal velocity | when something can't increase in acceleration anymore (drag = weight) |
| formula for overall stopping distance | OSD = TD + BD |
| formula for thinking distance | TD = s x t |
| formula for braking distance | BD = 1/2 bh (area |
| factors affecting braking distance | 1. speed of car 2. condition of brakes 3. terrain / road |
| state the law of conservation | total momentum before collision = total momentum after collision |
| unit for a moment | Nm |
| formula for a moment | moment = Fd |
| formula to work out gravitation field strength | w = mg |
| what is the value of gravity | 10 |
| what causes the planet's to orbit | weight |
| star | burning ball of mainly gases |
| galaxy | a collection of billions of stars |
| universe | a collection of billions of galaxies |
| Milky way | the name given to our local solar system |
| Moon | a natural satellite that orbits a planet |
| Planet | a natural satellite that orbits a star |
| solar system | a star and everything that orbits a star |
| comet | natural satellite that orbits a star (our sun) in a highly eliptical orbit. A comet has a tail |
| asteroid | a natural satellite that orbits the sun in a roughly circular orbit |
| unit for momentum | kgm/s |
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