1. Science 9 Chapter 5: Work and Machines Chapter 6: Thermal Energy
Section 5.1:Work

2. Work --_____ is the transfer of energy that occurs
when a _____ causes an object to _____.
--No work is done if you push against a _____ or
other object that doesn’t _____.

3. --For work to be done, two conditions must be
met:
1. The __________________.
2. The _______ of the object must be in
the same _____ as the applied _____.

4. Example:
--If you pick up some books from the floor,
your arms exert a _____ on the books that
cause them to _____ upward, and _____ is
done on the books.
--If you then carry the books to your next class,
your legs exert a _____ on the books and
your body, and _____ is done on the books
and your body by your legs since the books
and your body move in the _______ of the
force applied by your legs.

5. Work and Energy --Work and energy are related; when _____ is
done _____ is transferred from the object
doing the work to the object the work is done
on.
--Energy is the ability to cause change or to
______.

6. Calculating Work Done --Since work involves a force causing an object
to move some distance, work is calculated by
multiplying the force times the distance:
_________________ or
________

7. The Joule --The unit of work is the _____ (1 J = 1 N x 1 m).
--The unit of work is the same as that of _____
since _____ transfers energy from one object
to another.

8. Example: How much work is done in moving a car if a force of
N is exerted over a distance of 40.0 m?