Simple Machines
The equation for calculating efficiency.
What is the useful work output / total work input?
The equation for calculating work.
What is Work = Force x Distance?
The equation for calculating power.
SONAR would be an example of this energy type
What is sound energy?
A worker does 500 J of work by pushing a cart 25 meters. What force did they apply?
What is 20 N?
Scissors and tongs are considered this type of simple machine
What is a lever?
The unit distance is measured in
What is meters (m)?
Two units power can be measured in
What are Watts (W) and Joules/Sec (J/s)?
Explain the law of conservation of energy
What is energy cannot be created or destroyed, only transformed?
A motor has a power of 150 W and does 900 J of work.
How long did it run?
What is 6 s?
The 3 benefits of simple machines
What are makes tasks easier, conserves energy, and increases power?
Explain how work and energy are related
What is energy is the ability to do work?
The definition of power
What is the amount of work that can be done in a given amount of time?
An atomic bomb before it detonates is this type of energy
What is potential energy?
A machine with 250 W of power runs for 8 seconds.
How much work does it do?
What is 2000 J?
The definition of a wedge
What is a simple machine that tapers to a thin edge?
Give an example of work being done
Answers may vary
Completing a greater amount of work in less time results in ___________ power.
What is greater power?
Two units energy can be measured in
What is Newton - Meters (N-m) or Joules (J)?
A 10 kg object has 200 J of kinetic energy. What is its velocity?
What is about 6.32 m/s?
5 examples of a screw
Answers may vary
The relationship or correlation between work, force and distance
What is directly related or a proportional relationship?
The number of watts of power 1 horsepower equals
What is 746 watts?
Explain what happens to energy in a closed system
What is energy is never lost and as energy flows no matter is ever lost?
A force of 100 N moves a box 20 meters in 5 seconds. What is the power?
What is 400 W?