Work is the transfer of energy to an object by a force that makes an object move in the direction of the force.
Work is only being done while the force is applied to the object.
What is work?
100
A machine is any device that makes doing something easier.
What is a machine?
100
A machine that does work using only one movement
What is a simple machine?
100
A simple machine made up of a bar that pivots, or rotates, about a fixed point.
What is a lever?
100
The head.
What is a first-class lever in the human body?
200
W=Fd
What is the equation for work?
200
The ratio of a machine's output force produced to the input force applied
What is mechanical advantage?
200
Two or more simple machines that operate together.
What is a compound machine?
200
An axle attached to the center of a wheel and both rotate together.
What is a wheel and axle?
200
A foot.
What is a second-class lever in the body?
300
Power is the rate at which work is done.
What is power?
300
The ratio of the output work to the input work.
What is efficiency?
300
By changing the size of the force.
What is a way machines make work easier?
300
A flat, sloped surface.
What is an inclined plane?
300
The arm.
What is a third-class lever in the human body?
400
P=W/T
What is the equation for power?
400
E= Output work/ input work X 100%
What is the equation for efficiency?
400
A wheel and axle with teeth around the wheel.
What is a gear?
400
A sloped surface that moves.
What is a wedge?
400
Can be less than 1, equal to 1, or greater than 1.
What is the mechanical advantage of a first-class lever?
500
Joules.
What is work measured in?
500
MA= output force/ input force
What is the equation for mechanical advantage?
500
A wheel barrow.
What is an example of a second-class lever?
500
A simple machine that is a grooved wheel with a rope or a cable wrapped around it.
What is a pulley?
500
Greater than 1.
What is the mechanical advantage of a second-class lever?