Chapter 1- Conservation And Dissipation Of Energy Flashcards
When the gravitational potential energy increases…
It moves up because the work is done on it to overcome the force of gravity
What is the equation for the change in gravitational potential? (J)
Mass (kg) * gravitational field strength (N/kg * change in height (m)
When an object is moved by force…
Work is done
Work done (J) =
Force (N) * distance (m)
Work done to overcome force is…
Transferred as energy to the transferred energy stored of the objects that rub together
Name the 7 types of energy stores-
Chemical, electrical, magnetic, elastic potential, nuclear, thermal, gravitational and kinetic CEMENTGK
The 4 ways that energy can be transferred-
Heat, electric current, radiation, motion HERM
Wasted energy that is not used is…
Transferred by an undesired pathway. As energy dissipates it gets less useful
Energy cannot be…
Created or destroyed
Efficiency of a device=
Useful output / total output
Power =
Energy / time
The nervy stores in a moving object depends upon…
It’s mass and speed
Kinetic energy=
0.5 * mass * speed^2
