Download Physical Science Chapter Five Study Guide Work and Machines

Physical Science Chapter Five Study Guide
Work and Machines
*Answer the following questions in detail and study to prepare for the upcoming test on
chapter 5 (Work and Machines). This study guide is worth 20 pts. Study guides turned in
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What is an inclined plane? What is it designed to do?
What is a simple machine? What does it change (in terms of forces)?
Define the term lever?
Describe power. How does it relate to work?
What is transferred to an object when work is done?
How are the input and output work related to the efficiency of a machine?
What is the mechanical advantage of a machine? How is the effort force related to
the M.A.?
What do two inclined planes form? How is the answer to this question used?
What is a screw made up of?
What does a mechanical advantage of 1 indicate about a machine?
Name two examples of inclined planes.
What is a compound machine? Give two examples.
What unit is power measured in? Units of power in heating and cooling units are
usually measured in _________________.
A lever with a mechanical advantage greater than 1 is used to increase what?
Compare a pulley, wedge, lever, and wheel and axle. How are they alike, different?
What makes up a block and tackle? Why is it used?
What simple machines make up a bicycle?
How do a pulley and wheel and axle compare to a lever?
What can a simple machine not do? (related to work)
The distance of an inclined plane is 12m and its height is 4m. What is the IMA of
the inclined plane?
The same inclined plane in #20 has a force of 70N. What would be the weight of a
block going up the inclined plane? (draw a picture to illustrate)
What would the work be to move the block up the inclined plane?
If you doubled the weight of the block, what would that do to the work required to
move it up the inclined plane?
If the efficiency of the inclined plane is 100%, the force required to lift the block off
the ground would be __________________.
How does the fixed pulley make the block easier to lift?