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Physical Science complete Review Part 3

AB
What is weight?measure of the force due to gravity acting on a mass
______ is done when an object is moved through a distance in the direction of the applied force.Work
A device that makes work easier is a:Simple machine
What are the different purposes of simple machines?To change the effort needed (mechanical advantage; to change the direction or distance to which the force is applied; to change the speed at which the resistance moves; or a combination of these.
The work put into a machine is always greater than the work output due to:friction
The ratio of workout put to work input is called:efficiency
Formula for speedspeed+distance/time (s=d/t)
ForceForce=mass x acceleration (F=ma)
WorkWork = force x distance (W=Fd)
PowerPower = work/time ((P=Wt)
What is Newton's First Law of Motion?An object in motion tends to stay in motion, and an object at rest tends to stay at rest, unless the object is acted upon by an outside force.
What is Newton's Second Law of Motion?Accerleration=Force/Mass; Force= Mass X Acceleration; A=F/M or F=MA.
What is Newton's Third Law of Motion?Every action has an equal and opposite reaction.
A property of matter that affects the flow of electricity is _____.resistance.
Some substances have more ____ than others.resistance
____ can cause electrons to be transferred from one object to another.Friction
Electricity is related to:magnetism
Magnetic fields can produce ___________ in conductorselectrical current
Electricity can produce a magnetic field and cause iron and steel objects to act like ___.magnets
Electromagnets are ____ magnets.temporary
Electromagnets lose their magnetism when the _______ is removed.electric current
A generator is a device that converts:mechanical energy into electrical energy
Most of the electricity we use comes from:generators
Electric motors convert:electrical energy into mechanical energy that is use o do work
If one burned-out bulb on a string of holiday lights causes the whole string to go out, the lights are on a ____ circuit. If all of the other lights remain lit, the lights are on a ______ .series; parallel
Both a motor and a generator have __________ and a coil of wire that creates another magnetic field.magnets (or electromagnets)


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