energy
magnetism
friction
gravity
simple machines
100
what is the definition of energy
In physics, energy is simply defined as the ability to do work.
100
what is magnetism
an invisible force that occurs through a magnetic field, which allows objects to attract or repel each other.
100
if an object has 20lbs of force in one direction before friction and 4lbs of friction how much force is there after accounting for friction
what is 16lbs of force
100
what is gravity
the invisible force of attraction between any two objects with mass or energy
100
what is the description of the simple machines
mechanical device that changes the direction or magnitude of a force.
200
what are the two forms of energy
heat and light
200
what are the poles of a magnet
south and north
200
what is friction
what is a force the contact force that resists the sliding or rolling of one solid object over another.
200
what is the gravity of the moon
about 1/6th of earth's or 1.625m/s2
200
what is a Wedge
Two back-to-back inclined planes used to split, cut, or hold an object in place.
300
what are the forms of energy transfer
mechanical, electrical,heating, (radiation but you don't need to get that)
300
what causes magnetism
the motion of electric charges or electrons
300
what is the byproduct of friction
heat
300
what is the approximate acceleration value for earth's gravity
9.8m/s2
300
what is a Pulley
A grooved wheel with a rope or cable running through it. It changes the direction of your pulling force, allowing you to lift items by pulling downward.
400
when was electricity discovered
circa 600 BCE
400
which way does the magnets flow
north to south
400
what can decrease friction
better lubrication, shape or matterials
400
how much gravity is there on Mars (compared to earth)
~60% of earths gravity is experienced on mars
400
what is a Wheel and Axle
A wheel locked to a central shaft. Turning the larger wheel requires less force to turn the smaller axle.
500
what is the average energy consumption for a person
899 kWh per month
500
what year was the magnets discovered
600bc
500
who discovered friction
Leonardo da Vinci
500
what is the formula for gravity
500
what is a lever, give an example of where it's used
A rigid beam that pivots on a fixed point called a fulcrum. It is used to multiply force to lift heavy loads.