Science Chapter 16
Name:_________________________
Simple Machines
1. In order to lift a heavy load,
1. The fulcrum should be closer to the
where should the fulcrum be to
load than the effort.
move the load with little effort?
2. If I add a pulley to a compound
2. The amount of effort needed is
pulley, what is the result?
reduced.
3. In order to move an object up an
3. The inclined plane would need to be
inclined plane with little force, how
a gentle slope, and I would want a
would you move your inclined plane,
smooth surface, because a sand paper
and what kind of surface would you
surface and steep slope would
need?
require more force.
4. How does a wedge function?
4. A force strikes the flat end of the wedge
and drives the thin edge of the wedge
forward.
5. What is a pulley?
5. A wheel with a rope, wire, or chain
around, it is called a pulley.
6. The Pepsi guy uses a ramp to
6. A ramp can be callled an inclined plane.
enter the building, what simple
A ram pcan be used to move objects up and
machine did he use?
down.
7. How do simple machines help to
7. Simple machines decrease the amount
make tasks easier?
of force needed to do the task.
8. If I put two inclined planes
8. If I put two inclined planes together you
together, what simple machine did
get a wedge.
I create?
9. What are some things are made
9. Some things that are made up of levers
up of levers?
include scissors, ice tongs, nutcracker,
and pliers.
10. What is a lever?
10. A lever is a long bar with support.
11. What is a fulcrum?
11. A fulcrum is a support that a lever
rests on.
12. What is an object you want to
12. An object that you want to move is
move?
called a load.
13. What is it called when you push
13. When you push or pull a bar and it
or pull on the bar the bar that makes
moves the load in some way it is called
the load move in some way?
effort.
14. What is a wheel and axle?
14. A wheel and axle is a type of lever that
moves or turns an object, like a Ferris Wheel.
15. What does a wedge do?
15. A wedge is used to split things apart
or move things and it is a special inclined
plane.
16. What is a screw?
16. A screw is used to fasten things and it
is a special kind of inclined plane.
17. What does it mean in science to
17. To do work means to push or pull to
do work?
make an object move.
Be able to write about numbers 18, 19, and 20.
18. What simple machines are
18. The simple machines in a can opener
in a can opener?
include: lever, wedge, wheel and axle.
19. What types of simple machines
19. A pair of scissors has the simple
does a scissors have?
machine called a lever.
20. A student pushed a box part-way
20. The box is not sliding back down the
up a ramp and then stopped to rest.
ramp because the friction between the
Explain why the box is not sliding
ramp and the box is balancing the
back down the ramp as the
downward pull of gravity.
student rests.