Potential Energy and Kinetic Energy and Transformation of Mechanical Energy Flashcards
Why do we need to eat? And healthy ones?:
a small portion of this energy is converted to
useful work
main source of energy
food
Much of the energy is converted to
heat energy
while some unused energy is stored as
fats
Most energy transformations
are not efficient
The Calorie (with a capital C), is the unit used by dieticians to
specify the energy content of food
While calorie, (with a small c) is the amount of
heat energy generated
1 Calorie (with a capital C) is equals to
1000
1 calorie (with a small c) is equals to
4,186 J
is an important part of our daily lives
energy
what happens when we have no energy
we won’t be able to do any form of work
A person, an object, or a system has
energy if it is capable of exerting force on another object and does work on it
what type of quantity is energy?
scalar quantitty
Most forms of energy can be
transformed into other forms
makes use of at least one form of energy
Everything that we do
Modern civilization is possible because
people have learned how to change energy from one form and then use it to do work.
