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Forces
Review of Forces
| Question | Answer |
|---|---|
| anything that can cause an object to change its motion (accelerate) | force |
| law that says Force= mass times acceleration (F=ma) | Newton's 2nd law of motion |
| when forces acting on an object are equal and opposite | balanced |
| the sum of all forces acting on object | net |
| F = Gm1m2/ d^2 | Universal gravitation equation |
| force that always opposes motion | friction |
| SI unit for force and weight | Newtons ( N ) |
| SI unit for mass | kilograms ( kg ) |
| SI units for acceleration | ( m/s^2 ) or ( m/s/s ) |
| the tendency of an object to continue its motion (or stay at rest) | inertia |
| type of friction that works on stationary objects (at rest) | static |
| type of friction that works on moving objects (in motion) | kinetic |
| the path of motion of any projectile | curved |
| force that always causes a downward acceleration | gravity |
| when only force acting on falling object is gravity | free fall |
| mass times velocity | momentum (p) |
| a falling object reaches this constant (max) speed when gravity and air resistance is equal | terminal velocity |
| when 2 objects hit each other | collision |
| this says that for every force there is an equal and opposite force | Newton's 3rd law of motion |
| this says that an object in motion will stay in motion until acted on by a net force | Newton's 1st law of motion |
| when object and its surrounding s are both in free fall | apparent weightlessness |
| the amount of matter an object has | mass |
| measure of gravity's pull on an objects matter | weight |
| SI unit for momentum | kg * m/s |
| quantity that is magnitude only | scalar (ex. speed, mass and weight) |
| quantity that is both magnitude and direction | vector (ex. acceleration , velocity, momentum |
Created by:
cadetjt
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