What is Work
Simple Machinces
All About Levers
Energy
Random
100
What is another name for the force applied to move a load?
Effort
100
Name one example of an inclined plane
A ramp, hill, staircase
100
Draw or demonstrate a Class 1 lever
Example: seesaw, scissors
100
What is kinetic energy?
Objects that are in motion
100
Why are vents placed in the floor?
Heat rises
200
Will a long inclined plane make your job easier or harder?
Easier
200
Machines with few pieces are called _____?
Simple machines
200
Draw or demonstrate a Class 2 Lever
Examples: Sweeping a broom, Wheelbarrow
200
What is potential energy?
Objects with stored energy due to a force acting upon them
200
If something is hot, are the particles fast moving or slow moving?
Fast
300
What is work?
Applying a push or pull to an object to make it move
300
Simple machines allows to ______ force or distance
Multiply
300
When do we use levers most often?
To lift and/or move loads
300
A thermometer measures this type of energy
Thermal energy
300
What is Efficiency?
a comparison of the amount energy required to power a machine (energy input) with the amount of work the machine is able to do with that energy (energy output)
Energy input vs Work output
400
What is the mathematical formula for work?
Force x Distance
w=FxD
400
Name all 6 simple machines
Pulleys, levers, wedges, inclined planes, wheel and axle, screws
400
Name the 3 parts of a lever
Load, Effort, Fulcrum
400
What is chemical energy?
Substances with energy stored in chemical bonds
400
Water at the top of a waterfall has what kind of energy?
Potential energy
500
What are the three requirements for Work to happen?
1)Force must be applied on an object
2)The object must travel a distance
3)The force applied and the distance travelled must occur in the same direction
500
This is an example of what type of simple machine?
Pulleys/ Pulley system
500
A person swinging a golf club is what kind of lever?
Class 3 lever
500
Name the 3 ways that machines lose energy
●friction between any two moving parts that are in contact
●heat that is given off by the cooling system or exhaust
●incomplete combustion (if the machine uses fuel)
500
A toaster turns ______ energy into _____ energy.
1. Electrical
2. Thermal (heat)