Energy Flashcards
What is the principal of conservation of energy
States energy can be changed from one form to another but amount doesn’t change (energy can’t be created or destroyed just passed from one form to another)
What’s non-renewable energy
Have a finite/limited supply and will eventually run out or cannot be replaced in a human lifetime
E.g. fossil fuels
What’s renewable energy
Energy that will never run out or can be replaced in a human life time
E.g. sun energy
What’s renewable energy
Energy that will never run out or can be replaced in a human life time
E.g. sun energy
What is power
Defined as work done/energy transferred per second
What is kinetic energy
Energy that is possessed/ taken in by a moving object
What is the equation for power
Power(w)=work done or energy transferred(J)/time(s)
What’s kinetic energy
Energy possessed (taken on) by a moving object
What is the equation for kinetic energy
KE(J)=1/2mass(kg)velocity(m/s^2)
What’s potential energy
Energy associated with a mass’ position in a gravitational field
What’s the formula for potential energy
PE=massgravityhieght
What is work done
When energy is transferred from one form to another
What is the equation for work done
Work done(J)= force/distance
What is efficiency
The ratio of useful energy given out to the useful energy given in( or wasted)
How do you calculate the efficiency
Eff=useful energy out/ useful energy in
