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revise (9.1 (((Load: force, such as the weight of an object, resisting…
revise
9.1
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Load: force, such as the weight of an object, resisting motion against which a lever that works
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mechanical advantage: the advantage of force-multiplying levers or other machines as defined by load/effort
speed multiplier: simple machine that increases the speed of an object. The the load but applied over a shorter effort applied must be greater than sports psych distance.
8.1
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Force: A push, pull or twist. Forces are measured in newtons
9.4
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Gears: A gear or cogwheel is a rotating machine part having cut teeth or, in the case of a cogwheel, inserted teeth, which mesh with another toothed part to transmit torque. Geared devices can change the speed, torque, and direction of a power source
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9.2
ramp: simple machine, called an inclined plane, that reduces the effort required to raise objects to a higher level
inclined plane: a simple machine that uses sloping surfaces to reduce the effort required for a task
8.2
Permanent magnets: retain their magnets even when nothing is in contact with other magnets. the most common natural permanent magnets contain 1 or more the elements iron, nickle and cobalt. the most example is magnetic (also known as a lode one)
Magnetic Force: is an an example of a non-contact force as it acts between objects even though they are not touching
8.3
electrons: very light negatively charged particles inside an atom . they move around the central nucleus of an atom
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Atoms: A very small particle that makes up all things . Atoms have the same properties as the objects they make up
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8.4
Gravity: the force of attraction between two bodies and the force of gravity will vary with the mass of the object.
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9.3
wheel and axle: lever that can rotate.The effort applied to the outside of the wheel produces a greater force on the axle because the effort is moved over a longer distance