is the total amount of potential and kinetic energy in a system
What is Mechanical
100
Green plants convert light energy from the sun into
What is Chemical Potential
100
A slanted surface used to raise an object is called an
What is inclined plane
100
The rate at which energy is converted is called
What is Power
200
?=1/2 m x v ^2
What is Kinetic Energy
200
Kinetic energy depends on mass and
What is Speed
200
The unit of power is the ________.
What is Watt
200
A ____ is a device that makes work easier.
What is Machine
200
Work is the transfer of ______ that occurs when a force makes an object move
What is energy
300
? = Win/Wout x 100
What is efficiency
300
Anything that can fall has stored energy called
What is GPE
300
A device that does work with only one movement and changes the size or direction of a force is
What is Simple Machine
300
The kinetic energy of an object increases as its ______ increases
What is Speed
300
When a plant falls from a window its _____ energy is transformed into kinetic energy.
What is Potential
400
? = Fout/Fin
What is Mechanical Advantage
400
Thermal energy is measured in
What is Joules
400
The amount by which a machine multiplies an effort force is called the
What is Mechanical Advantage
400
A toaster uses _____energy to make toast
What is electrical
400
Which 3 things are used to calculate potential energy?
What is Mass, Gravity, Height
500
A carpenter lifts a 10-kg piece of wood to his shoulder 1.5 m above the ground. He then sets the wood on his truck at 1.0 m above the ground and makes his delivery going 10 m/s.
What is GPE of the wood when it is on his shoulder?
What is 147 J
500
The mechanical energy of a coconut falling from a tree does what?
What is remains constant
500
A rock at the edge of a cliff has _____ energy because of its position
What is GPE or Potential energy
500
Which of the following CANNOT be done by a simple machine?
a. increase the amount of work done
b. change the direction of a force
c. decrease the time it takes to do the work
d. transfer energy from one location to another
What is a. Increase the amount of work done
500
Two copies of the same book are in a book case. One book is twice as high as the other. They have ______ potential energy.