click below
click below
Normal Size Small Size show me how
forces,motion,machin
science
Question | Answer |
---|---|
speed | distance over time |
acceleration | final velocity-intial velocity over time |
force | mass times acceleration |
work | forcer times distance |
mechanical adv. | outputforce over input force |
Newton's first law of motion | objects at rest remain at rest and objects in motion will stay in motion with the same velocity, unless acted on by an unbalanced force |
Newton's second law of motion | the acceleration of an object increases with increased force and decreases with increased mass |
Newton's third law of motion | everytime one object exerts a force on another object the second object exerts a force that is equal in size and opposite in direction back on the first object |
mass | is the number of particalesin an object |
weight | measure of force of gravity changed by location |
inertia | the resistance of an object to change in the speed or the direction of its motion |
air resistance | a type of fluid friction experienced by objects falling through the air |
balanced forces | equal force of opposite directions acting on an ibject that doesn't cause motion |
unbalanced forces | unequal forces which cause and object to move or to have motion |
velocity | speed plus direction |
inclined plane | ramp |
wedge | door stop |
wheel/axel | screwdriver |
screw | spiral staircase |
pulley | block-and-tackle |
1st class lever | carjack |
2nd class lever | weelberow |
3rd class lever | axe |
three types of friction | 1.sliding 2.rolling 3. fluid |
terminal velocity | the maximum velocity of an object falling when the air resistance equals gravity |