Module 6 Flashcards
It is a product between two variables which, when sketched against a coordinate plane, their vector arrows are set against each other, tail to tail.
dot product
Applying a force over a certain distance is the simplest definition of ___.
work
It is an action of a force, moving in a certain direction, to an object. Meaning, it is achieved if the object is moving alongside the direction the force is directed at, or the object is moving at a component of the force’s direction.
Mechanical work
work is not applicable if:
- the object is not moving; and
- the force being applied on the object is perpendicular to the object’s motion
What are the conditions in order to do work?
- the force and the direction of the resulting, or existing, motion is the same; or
- a component direction of a force acting on the object is moving in the same direction as the object’s
The unit of work, which is a dot product derived value, is (1)___. But, it is often shortened to (2)___, in honor of the English physicist (3)___, and to avoid confusion with another concept in Mechanics.
(1) Newton – meters (Nm), (2) Joule (J), (3) James Prescott Joule
It is the computed amount of work done within a certain time.
Power
Power’s derived unit is the (1)___, named after the mechanical engineer (2)___.
(1) Watt (𝑊𝑊), (2) James Watt
What is the other unit for power which is equivalent to 746 watts?
horsepower (ℎ𝑝) or imperial horsepower
It is best defined as the property that objects need to transfer in order to perform work. Since there is transfer involved, it can neither be created nor destroyed. It can only change forms, which allows a body to perform work on another body.
Energy
Its unit is also ___. But it can also be watt-second, watt-hour, horsepower-second, horsepower-hour, and so on.
joule
What are two basic forms of energy?
kinetic and potential
It is the energy translated in motion (i.e. it is the energy observed in motion). It is also best explained
as the energy an object possesses because it is moving.
Kinetic energy
It is the energy observed from rest, either from its position to other objects, stresses within itself, and many more.
Potential energy
It is the potential energy stored due to a change in height.
Gravitational potential energy (abbreviated as 𝑈𝑔𝑔)
The ___ the object, the ___ its potential energy.
higher, higher
It is the potential energy stored by an object as it gets pulled apart or compressed.
elastic potential energy
Elastic 𝑃𝐸 exists under two forms:
elastic and spring
It is the energy stored due to the object being compressed from its ends.
Spring potential energy
It is a unique value wherein it depends on the material’s elasticity.
spring constant
Law of Conservation of Energy
Energy is a concept that is neither created nor destroyed. It only transfers, and changes form, from one body to another.
The Law of Conservation of Energy is one of the fundamental conservation laws in Physics that explains that the total energy of the system is ___.
constant
What are two classifications of force?
conservative and non-conservative
It is a force whose work done between two given points is independent from the path taken by the work itself. It also implies that if potential energy can be associated to a force, that force is ___
conservative force
