Energy
Energy
By the end of this unit, students will know:
Definition of work, including when it is positive, negative, or zero.
How to apply the work-energy theorem.
The concept of a conservative force.
The concept of potential energy.
The concepts of mechanical energy and of total energy.
Conservation of energy.
The definition of power.
By the end of this unit, students will be able to:
Calculate the work done by a specified constant force on an object that undergoes a specified displacement.
Relate the work done by a force to the area under a graph of force as a function of position, and calculate this work in the case where the force is a linear function of position.
Use the scalar product operation to calculate the work performed by a specified constant force F on an object that undergoes a displacement in a plane.
Calculate the change in kinetic energy or speed that results from performing a specified amount of work on an object.
Calculate the work performed by the net force
Work and Energy
W = Fd
GPE = mgh
KE = (1/2)mv^2
EPE = (1/2)kx^2
Conservation of Energy
Closed Systems
Energy Initial = Energy Final
Open Systems
Energy Initial + Work = Energy Final
Power
Units:
J/s (Joules / seconds)
W (Watts)
