Inputs and outputs
Anything that you put into a system to be processed (energy, physical items, etc.)
What is an input?
The definition of work.
What is the amount of force used to travel a certain distance
The definition of Power.
What is the rate at which energy travels through a system
The definition of system.
What is a set of interconnected pieces that work together to perform a function.
The energy of movement is known as
What is Kinetic Energy
Anything that emerges from a system after processing, both wanted and unwanted.
What is an output?
Work is measured in ____________
What are Joules?
Power is measured in....
What are watts?
The primary purpose of a pencil sharpener
What is to create a usable pencil with a sharp point?
Provide an input for a bicycle system.
Examples: Energy, feet pushing the pedals, the metal parts to make a bike, etc.
What are two inputs to the "growth and processing" stage for apple sauce?
Examples: sun, water, land, apple seeds, farmer, fertilizer, pesticides, etc.
A worker uses 25 Newtons of force to lift a box 5m into the air. How much work has been done?
What is 125 J.
A motor performs 1000 L of work in 10 seconds. This is the power rating of the motor.
What is 100 Watts
The first system involved in food processing
What is Growth and Harvest?
You push against a brick wall with all of your strength for one hour, but the wall doesn't move. This is how much "work" was done
What is 0 J
What are two outputs for the "disposal" stage of Skittles?
examples: plastic in a landfill, microplastics in the environment, human waste in the sewage system, etc.
A baseball player hits a baseball with 200N of Force and does 4000 J of work. What distance does the baseball travel?
what is 20m
Two students of equal mass run up the same stairs. Student A finishes in 5 seconds while Student B finishes in 10 seconds. This student was twice as powerful
Who is student A?
A system that is not made of physical parts but rather people or procedures (e.g. the education system).
What is a social system?
A type of system that uses compressed gasses to perform work
What is a pneumatic system?
The unintended output often caused by friction in mechanical systems
What is heat?
The difference between work and power.
What is: Work is the measurement of force over a distance while power is a measure of how quickly energy moves through a system.
If you want to increase your power while lifting a weight, you must move the weight __________
What is faster?
All mechanical systems must contain at least one of these.
What is a machine?
Give an example of work that could be done with 1 Joule of energy.
What is lift a small apple 1m, turn on one small LED light for 1 second