Welcome to Jeopardy

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# Welcome to Jeopardy - PowerPoint PPT Presentation

Welcome to Jeopardy. Round 1. Work 100. This is the definition of work. Work 200. This is the unit for work. Work 300. In order for work to be done these 2 things must take place. Work 400. If a force of 50N is used to lift a book 10m, How much work is done?.

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## Welcome to Jeopardy

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Presentation Transcript

### Welcome to Jeopardy

Work 100
• This is the definition of work.
Work 200
• This is the unit for work.
Work 300
• In order for work to be done these 2 things must take place.
Work 400
• If a force of 50N is used to lift a book 10m, How much work is done?
Work 500
• How much force was necessary to move a brick 5m if 200J of work was done?
Potential Energy 100
• This is the definition of PE.
Potential Energy 200
• Give 2 types of Potential Energy
Potential Energy 300
• This is the equation for PE.
Potential Energy 400
• What is the PE of a 100kg ball that is resting on a 50m high shelf?
Potential Energy 500
• How high must a 25kg ball be resting if its Potential Energy is 500J?
Kinetic Energy 100
• This is the definition of KE.
Kinetic Energy 200
• List 2 examples of KE.
Kinetic Energy 300
• This is the equation for Kinetic Energy.
Kinetic Energy 400
• What is the KE of a 10kg ball which is rolling down a hill at a speed of 2m/s?
Kinetic Energy 500
• What is the mass of a ball that has 100J of KE and is moving at a velocity of 5m/s?
Power 100
• This is the definition of Power.
Power 200
• This is the unit for Power.
Power 300
• This is the equation for power.
Power 400
• What is the power of a light bulb that does 200J of work in 10s?
Power 500
• How long does a 60watt bulb need to be on to do 600J of work?
Energy 100
• This is the Law of Conservation of Energy.
Energy 200
• Give 1 example of a fossil fuel.
Energy 300
• Visible light is an example of what type of energy?
Energy 400
• When you rub your hands together of a cold day, you use friction to convert ___________ energy into ___________ energy.
Energy 500
• What type of conversion is taking place when natural gas is used to heat water?
Work100 Response
• Work is the product of a force applied to an object and the distance it moves.
Work 300 Response
• Force must be applied on an object and the object must move.
Work 400 Response
• W = F x d

= 50N x 10m

= 500J

Work 500 Response
• W = F x d

200J = F x 5m

200J/5m = F

40N = F

Potential Energy 200 Response
• Elastic PE
• Gravitational PE
Potential Energy 400 Response
• PE= m g h
• = 100kg (10m/s2) (50m)
• = 50,000 J
Potential Energy 500 Response
• PE = m g h

500J= 25kg (10m/s2) h

500/250 = h

250m = h

Kinetic Energy 400 Response
• KE = ½ (10kg) (2m/s)2

= .5 (10) (4)

= 20 J

Kinetic Energy 500 Response
• KE = ½ m v2

100J = .5 m 52

100J = .5 m 25

100/12.5 = m

8kg = m

Power100 Response

Power is the amount of work done over a period of time.

Power200 Response
• Watt or kilowatt
• w or kw
Power 300 Response
• P = work/time

Or

P = F d/t

Power400 Response
• P = work/time

= 200J/10s

= 20 Watts

Power 500 Response
• P = work/time

60W = 600J/t

t = 600/60

t = 10s

Energy100 Response
• Energy can not be created or destroyed but may be changed from one form to another.
Energy 200 Response
• Oil, gasoline, coal
Energy 300 Response
• Electromagnetic
Energy 400 Response
• You use friction to convert mechanical energy into thermal energy
Category 5 500 Response
• CHEMICAL ENERGY is converted to THERMAL ENERGY

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