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Work
Energy
Power
Conservation of Energy
Calculations
100
The definition of Work
What is a force applied through a distance?
100
Energy of motion
What is kinetic energy?
100
The definition of Power
What is the rate at which work is done?
100
The definition of conservation of energy
Energy can not be created or destroyed it can only change forms
100
You push a 1,000 N car 5 meters. How much work did you do?
What is 5,000 J of work
200
If you push harder (more force) you do __________ work
What is more?
200
Energy of position
What is Gravitational potential energy?
200
More or Less Power? You take longer to climb a flight of stairs.
Less Power
200
How do you calculate the total mechanical energy of a system?
What is Potential + Kinetic?
200
It takes 5000J of work to stop a 70 kg biker. How fast was that biker going?
What is 11.9 m/s?
300
If you push on a 10 kg toy for a distance of 1m how much kinetic energy does this object have?
What is 10 J?
300
Kind of energy that increases as an object moves faster and faster.
What is kinetic energy?
300
The unit of Power
What is Watt?
300
What is the energy transformation when an object is tossed into the air?
What is Kinetic to Potential?
300
You lift a 50 N rock up a 5 m staircase in 10 seconds. How much power did you generate?
What is 20 W
400
To do work, force has to be in which direction to the motion?
What is parallel to the motion?
400
The unit of Energy
What is Joule
400
The amount of Power generated if 40 Joules of work is done in 2 seconds.
What is 20 Watts?
400
Part way down a frictionless roller coaster, the car has 30 J of Potential Energy, and 60 J of Kinetic energy. How much kinetic energy will the car have at the bottom of the hill?
What is 90 J?
400
Halfway down a roller coaster, you have 50 J of GPE and 50 J of KE. What is the amount of PE you had at the top of the hill?
What is 100 J
500
The amount of work being done when holding a 200 lb barbell above your head for 30 seconds.
What is no work?
500
Name four different types of Energy
GPE, Kinetic, Chemical, Sound, Light, Thermal, Elastic
500
How much power is needed to lift 500 kg at a speed of 5 m/s?
What is 24,500 Watts?
500
A 50kg cart starts at the top of a 10m high hill. it then rolls down the hill. What is the speed of the cart at the bottom?
What is 14 m/s?
500
Halfway down a roller coaster, you have 5000 J of GPE and 5000 J of KE. If you are in a 20 kg cart, what is height of the original hill? (Assume g=10 m/s2)
What is 50 m