Work/Power
Vocabulary / Misc.
Calculations
Energy
Even More Calculations
100
force acting through a distance
What is work.
100
Device that makes doing work easier.
What is a machine?
100
How much work is done if an object is pushed a distance of 3 meters with a force of 225 Newtons?
Work = 675 Joules
100
Joules
What is unit of energy?
100
A boulder is at the top of a cliff, 67 meters above the ground. If has a weight of 888 N. What is its GPE?
GPE = 59496 Joules
200
Watt
What is the unit for Power.
200
The ability to do work or cause change.
What is Energy?
200
If it takes 14 seconds to do 199 Joules of work, how much power is generated?
Power = 14.21 Watts
200
Energy involved in the internal movement of atoms.
What is Heat Energy?
200
A diver with a mass of 95 kg is standing at the edge of a diving board that is 12 meter off of the ground. What is the GPE of the diver?
GPE = 11,172 Joules
300
When object does not move OR when force and motion are not in the same direction.
What is when Work is Zero, or no Work is done.
300
Energy that is stored due to chemical bonds.
What is chemical energy?
300
What time does it take a machine to power up 19999 w and the total work done was 360 Joules?
Time = 0.018 seconds
300
Sum of kinetic and potential energies, energy associated with motion. HINT: Sound
What is Mechanical Energy?
300
While using a machine you put in 288 Joules of work and the machine gives you 42 joules of work. What is the efficiency of the machine?
Efficiency = 14.58%
400
Same amount of work is done, but time is increased, power will then...
What is example of how to decrease power.
400
Ratio of output work to input work.
What is efficiency?
400
How far did a box move if it was pushed with a force of 56 N and the total work done was 4780 J?
Distance = 85.36 meters
400
Energy
What is required by doing work?
400
What is the mass of an object that has a height of 3.56 meters and a GPE of 9982 Joules?
Mass = 286.12 kg
500
1 Newton x 1 meter
What is a Joule?
500
Energy cannot be created or destroyed, but it can be transferred.
What is the Law of Conservation of Energy?
500
A bowling ball has a mass of 16 kg and is traveling with a velocity of 22 m/sec. What is the kinetic energy of the bowling ball?
Kinetic Energy = 3,872 J
500
Energy that is stored due to position.
What is Potential Energy?
500
What is the power of an ox who pulls an object 20 m with a force of 255 N in 5 seconds?
Power = 1,020 Watts
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