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5th Science
Forces
Question | Answer |
---|---|
force | any push or pull that causes an object to move, stop, or change speed or direction |
friction | a force that opposes, or acts against motion when two surgaces rub against each other |
magnetism | the force of attraction between magnets and magnetic boxes |
gravitation | the force that pulls all objects int he universe toward one another |
balanced forces | equal in size and opposite in direction |
unbalanced forces | occurs when one force is greater than its opposite force |
net force | the value of combined forces on an object |
work | the use of force to move an object through a distance |
power | the amount of work done for each unit of time |
machine | something that makes a task easier by changing the size or direction of a force or the distance over which the force acts |