P1 Energy Flashcards
What are the nine different types of energy?
Kinetic Potential Mechanical Thermal Chemical Electrical Sound Light Nuclear
What does the conservation of energy state?
That the total amount of energy remains constant in an isolated system. It implies that energy can neither be created nor destroyed, but can be change from one form to another.
What is meant by the term “closed system”.
A closed system is a physical system that does not allow certain types of transfers (such as transfer of mass and energy transfer) in or out of the system.
What is the equation for work done?
Force x distance
W=Fxs
What is the unit for work done?
Joules
What does work done depend on?
The size of the force acting on the object. the distance through which the force causes the body to move in the direction of the force.
Describe the energy type gravitational potential energy.
Gravitational potential energy is energy an object possesses because of its position in a gravitational field.
What is the equation for gravitational potential energy
Mass x gravitational field strength(g) x height
Ep=mxgxh
What doe gravitational potential energy depend on?
Gravitational potential energy is due to the position of an object above Earth’s surface. The object has the potential to fall due to gravity. Gravitational potential energy depends on an object’s weight and its height above the ground
Describe the energy type kinetic energy?
The kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
What is the equation for kinetic energy
0.5 x mass x (speed)^2
Ek = 1/2 x m xv^2
What is Hooke’s Law?
The force is directly proportional to the extension
Force = spring constant x
