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Energy Conversion and Conversions
Conservation of Energy
Energy Conversion Calculations
Energy Conversion in Pendulums and the Pole Vault
Energy and Mass
100
When one type of energy converts into another, can some energy be destroyed in the process?
No energy can be destroyed in the process.
100
How does eating food relate to energy?
When you eat, the energy from the food is transferred into energy for the body.
100
From when an object is held at a certain height to when it rests on the ground, what is the relationship between the kinetic and potential energy?
KE=PE
100
In order to start the jump with as much KE as possible, what must the pole vaulter do?
Sprint
100
What is Einstein's equation?
e=mc^2
200
As an object falls, what type of energy is converted into what other energy?
gravitational potential energy is converted into kinetic energy.
200
When you pick up the pace on a bike, what happens to the energy?
The energy changes into kinetic energy.
200
What is the formula for mechanical energy?
Mechanical energy=KE+PE
200
At the highest point of a pendulum's swing, what energy does the weight at the end of the pendulum have?
Zero KE and maximum PE
200
Einstein's theory of relativity lead to the making of what?
Nuclear bombs.
300
Light bulbs convert what into what?
Light bulbs convert electrical energy into thermal and electromagnetic energy.
300
What does the law of conservation of energy state?
Energy cannot be created or destroyed.
300
What must not occur for mechanical energy not to change (when mechanical energy stays the same)?
The friction has to be small enough to be ignored
300
As a pole vaulter soars, what happens to his energy?
His KE decreases while he gains gravitational PE
300
What does Einstein's equation say about mass and energy?
That mass and energy are equivalent and can be converted into each other.
400
What type of energy is converted in a fan?
Electrical energy into mechanical energy.
400
When you stop pedaling wen riding a bike, what happens to the energy?
The kinetic energy is converted into thermal energy through the friction with the floor.
400
What is the conservation of mechanical energy formula?
(KE+PE)beginning=(KE+PE)end
400
As the pole vaulter plants his pole and propels himself, what energy is partially converted?
His KE is partially converted into elastic PE.
400
What is the speed of light?
3.0 x 10^8 m/s or 300,000,000 m/s