Science - 2019-20
PH.5 g - Work, Power, and Energy
The student will investigate and understand the interrelationships among mass, distance, force, and time through mathematical and experimental processes. Key concepts includeg) work, power, and energy.
- I can explain how machines have revolutionized the world.
UNDERSTANDING THE STANDARD
The concepts developed in this standard include the following:
- Work is the mechanical transfer
of energy to or from a system and is the product of a force at the point of
application and the parallel component of the object’s displacement. The net
work on a system equals its change in velocity.
- Forces within a system transform
energy from one form to another with no change in the system’s total energy.
- For a constant force acting on
an object, the work done by that force is the product of the force and the
distance the object moves in the direction of the force. The net work performed
on an object equals its change in kinetic energy.
- Power is the rate of doing work.
In order to meet this standard, it is expected that students will
g) solve problems involving mechanical work, power, and energy.