Chapter 13 Forces Lesson 4: Question Preview (ID: 3063)


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Which of the following is an example of a complex machine?
a) lever
b) wheel and axle
c) go-cart
d) pulley

What is one way a simple machine can help make work easier?
a) It can reduce the amount of work that needs to be done.
b) It can change the fulcrum of the force needed to do the work.
c) It can change the direction of the force needed to do the work.
d) It can make you stronger.

How can machines make work easier to do?
a) Machines reduce the amount of work that needs to be done
b) Machines change the direction or amount of force needed to do work
c) Machines change the mass of the object that needs to be moved
d) Machines increase the net force needed to do the work

Which of the following is a type of simple machine?
a) a car
b) a sailboat
c) a crane
d) a lever

Which of the following is an example of a lever?
a) wheel barrel
b) all of the above
c) scissors
d) clothes pin

Which complex machine uses mainly human force to operate the simple machines in it?
a) car
b) go-cart
c) bicycle
d) ship

Which of the following is an example of a wedge?
a) a door stop
b) a screw
c) wheel barrel
d) scissors

Which of the following is an example of a pulley?
a) a flag pole
b) sails on a boat
c) a bucket in a well
d) all of the above

Why is a screw considered a simple machine?
a) it has an inclined plane wrapped around it
b) it holds things together
c) its made of metal
d) it is used with a screw driver

Which of the following simple and complex machines would you find at school?
a) scissors
b) car
c) go-cart
d) sails on a boat

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