3.1
3.2
3.3
3.4
Random
100
Force exerted on an object that causes it to move.
What is work?
100
Device that allows you to do work in an easier way.
What is a machine?
100
The most basic device for making work easier.
What is a simple machine?
100
Simple machine made of a grooved wheel with a rope or cable wrapped around it.
What is a pulley?
100
The force exerted on a machine.
What is an input force?
200
The rate at which work is done.
What is power?
200
The percentage of the input work that is converted to output work.
What is efficiency?
200
A device that is thick at one end and tapers to a thin edge at one end.
What is a wedge?
200
A simple machine made of two connected objects that rotate around a common axis.
What is a wheel and axle?
200
A flat, sloped surface.
What is an inclined plane?
300
Formula to calculate work
What is work = force x distance?
300
Formula for finding mechanical advantage.
What is output force/input force?
300
Mechanical advantage of a screw.
What is length around threads/length of screw?
300
Formula for mechanical advantage of a wheel and axle.
What is radius of wheel/radius of axle?
300
Formula for mechanical advantage of a wedge.
What is length of wedge/width of wedge?
400
Formula for calculating power.
What is work/time or force x distance/time?
400
The mechanical advantage is always less than one.
What is when you increase distance?
400
Type of lever that changes the direction of the input force.
What is a first-class lever?
400
Pulley that only changes the direction of a force.
What is a fixed pulley?
400
Pulley made up of a fixed and movable pulley.
What is a block and tackle pulley?
500
Work is done when.....
What is when the object moves in the same direction in which the force is exerted?
500
The three ways machines make work easier.
What are increasing force, increasing distance, and changing direction?
500
Type of lever that increase distance, but does not change the direction of the input force.
What is a third-class lever?
500
If the input force on a pulley is 75N and the output force on the object is 375N, what is the mechanical advantage?
What is 5?
500
You go rock climbing with a pack that weighs 60N and you travel a distance of 25 m. in 5 minutes. What was your power?
What is 5 W?
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