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Science 2

QuestionAnswer
can friction do work on an object? yes
thermal energy total energy of the moving particles in a substance
kinetic friction energy removed from a moving object by the object it is moving against, two objects must interact, energy in the form of heat
static friction friction between two objects that are not moving, prevents an object from moving, not a force but a threshold
mechanical advantage doing more work with less effort
machine a simple system that reduces the force needed to do work, increases the amount of force applied
increasing the force work stays the same but force is increased
increasing the distance the object gains potential energy
changing the direction force applied in the same direction as load
input and output two forces involved when a machine does work
input force (Fin) force exerted on the machine
output force (Fout) force exerted by the machine
examples of an incline plane slide, ramp
examples of a lever hammer, teeter totter, shovel
examples of a wheel and axle roller blades, door handle, wheel barrow
examples of a pulley well, flag, elevator, crane
examples of a screw light bulb, jar lid
examples of a wedge fork, door step, axe
Created by: syddj123
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