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Section 1
Section 1 Cont.
Section 2
Section 2 cont.
Section 3
100
If you push or pull on an object and it doesn't move, have you done any work on that object?
What is No
100
A machine that does work with only one motion
What is a simple machine
100
When you ride on a playground swing, your Gravitational potential energy is greatest when you are at the ______ of your swing.
What is Top
100
What is the kinetic energy of an object traveling at 3.0 m/s and has a mass of 60.0 kg?
What is 1/2mv2 Don't forget to square the velocity! = 270J
100
What is the formula for power?
What is P= E/t Power = Energy divided by time
200
The formula for work is:
What is W=Force x distance
200
a machine changes the _________ or increases the motion from work.
What is Force
200
What is the formula for Gravitational Potential Energy?
What is PE = mgh Mass x gravity x height g= acceleration due to gravity = 9.8m/s2
200
A roller coaster will have the highest kinetic energy when it is a the _____________ of a hill.
What is Bottom
200
Energy is the ability to due work or cause this _______?
What is Change
300
The unit that work is measured in is:
What is Joules or J
300
when using a machine, work input is alway ________ than work output.
What is Greater
300
The formula for kinetic energy is:
What is KE = 1/2 mv2 or .5 x mass x velocity squared
300
Explain what height above the ground does to an object's potential energy.
What is The higher the object is above the ground the more potential energy it has.
300
This law says that energy cannot be created nor destroyed but only changes form.
What is The Law of Conservation of Energy
400
The formula for Mechanical advantage is
What is MA=Output force/Input force output force divided by input force
400
If the force on an object is 500N and the amount of work done on the object by the force is 15,000 J What is the distance in meters?
What is D=W/F D=15000J/500N = 30 meters
400
Kinetic energy is the energy of __________
What is Motion
400
An apple hanging off a branch has lots of this ________ but none of this _________ kind of energy?
What is Potential, kinetic
400
The total amount of energy in the universe never ________
What is Changes
500
The Efficiency of a machine can be measured by using this formula
What is E=output work/input work Output work divided by input work
500
What is the mechanical advantage of a machine that requires 250N of input force and gives an output force of 950N?
What is 950N/250N = 3.8
500
Compressing a spring is this form of potential energy:
What is Elastic
500
The energy in food.
What is Potential chemical energy
500
The total potential and kinetic energy in a system is called:
What is Mechanical Energy