JEOPARDY – work and Simple Machines Final Jeopardy Simple Machines WorkMachines Lever Mechanical Advantage and Efficiency

Work 100 Points This is the formula for work.

Work 100 Points Work = Force x Distance

Work 200 Points The amount of work done if a force of 3N moved an object 4 m.

Work 200 Points W = F x D W = 3N x 4m W = 12 J

Work 300 Points The way you can tell if work has be done.

Work 300 Points The object moves.

Work 400 Points The amount of force exerted if 15 J of work was done and the object moved 15 m.

Work 400 Points W = F x D 15J = F x 15m 1 N = F

Work 500 Points The distance the object moved if 25 J of work was done and a force of 5N was exerted.

Work 500 Points Work = Force x Distance 25 J = 5N x D 5M = D

Simple Machines 100 Points The machine that consists of a bar that pivots on a fixed point.

Simple Machines 100 Points Lever

Simple Machines 200 Points The fixed point where a lever pivots.

Simple Machines 200 Points Fulcrum

Simple Machines 300 Points A knife blade is an example of this simple machine.

Simple Machines 300 Points wedge

Simple Machines 400 Points A see-saw is an example of this type of machine.

Simple Machines 400 Points lever

Simple Machines 500 Points A simple machine with two sloping sides.

Simple Machines 500 Points wedge

Machines 100 Points This type of machine is composed of two or more simple machines.

Machines 100 Points Compound Machine

Machines 200 Points A machine cannot do this with work.

Machines 200 Points Machines cannot reduce the amount of work.

Machines 300 Points Machines will always do (more, less) work.

Machines 300 Points More work

Machines 400 Points As Egyptian pyramids moved higher and higher, what would they have to do with the ramps to keep the force the same.

Machines 400 Points Increase the distance (length) of the ramps.

Machines 500 Points Give two ways to use screws.

Machines 500 Points To bind materials together and to lift objects (jacks).

Lever 100 Points The pivot point of a lever.

Lever 100 Points Fulcrum

Lever 200 Points The arm of a lever that a person pushes on.

Lever 200 Points Effort Arm

Lever 300 Points The arm that supports the load.

Lever 300 Points Resistance Arm

Lever 400 Points The force that pushes the load upward.

Lever 400 Points Resistance Force

Lever 500 Points The force that a person pushes on the lever.

Lever 500 Points Effort force

Mech. Advantage and Efficiency 100 Points Use an inclined plane, calculate the force needed to push a 100 N load a distance of 25 meters to a height of 5 meters. 100 N 25 meters 5 meters

Mech. Advantage and Efficiency 100 Points Force = Load Height Distance Force =100 N 5M 25 m Force =500 Nm 25 m Force = 20 N

Mech. Advantage and Efficiency 200 POINTS 1.What would happen to the force needed to lift the block if the fulcrum was moved to the left? 2.Why would the force change?

Mech. Advantage and Efficiency 200 POINTS The effort force would decrease because the effort distance increased.

Mech. Advantage and Efficiency 300 Points The efficiency is the comparison of these two things.

Mech. Advantage and Efficiency 300 Points Work output and Work input

Mech. Advantage and Efficiency 400 Points The efficiency of a machine that has a work input of 200 J and a work output of 100 J.

Mech. Advantage and Efficiency 400 Points 50 %

Mech. Advantage and Efficiency 500 Points Machine cannot have an efficiency greater than this percentage.

Mech. Advantage and Efficiency 500 Points 100 %

FINAL JEOPARDY One variable you must reduce in order to increase efficiency.

Friction!