1
2
3
100
done when a force causes an object to move in the direction of the force
What is work
100
unit used to measure work
What is Joules (J)
100
a device that makes work easier by changing the size or direction of the force
What is a machine
200
rate at which energy is transferred
What is power
200
unit used to measure power
What is watt (W)
200
formula for mechanical advantage
What is MA= output force/ input force
300
formula for power
What is p=W/t
300
the number of times the machine multiples force
What is mechanical advantage
300
a comparison of a machine's work output with the work input
What is mechanical efficiency
400
formula for work
What is w=f*d
400
how can you increase the MA of a wheel and axle?
What is increase the radius of the wheel (or decrease the radius of the axle)
400
a machine with 100% mechanical efficiency
What is ideal efficiency
500
what is the force-distance trade off?
What is when force increases, distance decreases. If distance is increasing, than force decreases. both can't increase or decrease at the same time.
500
how can you calculate the mechanical advantage of a wheel and axle?
radius of wheel/radius of axle
500
what is the reason we can't achieve perfect/ideal machine efficiency?
friction
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