Font size
WorksheetsWork and Simple Machines Review
Total questions: 30
Worksheet time: 15mins
What is work?
when a force displaces an object in the same direction as the force applied
when you do something that is very hard
when a force is applied but the object does not move
when a force displaces an object in the opposite direction as the force applied
What is the formula for work?
W = F/d
W = Fd
W = d/F
W = ma
Calculate the work done by a 47 N force pushing a pencil 0.26 m.
47.26 J
180.77 J
0.0055 J
12.22 J
How far can a mother push a baby carriage using a force of 26 N, if she can only do 2,920 J of work?
112.3 m/s/s
112.3 m
2,894 m
75,920 m
If a small motor does 520 J of work to move a toy car 260 m, what force does it exert?
135,200 N
780 N
2 N
260 N
A 75.0 kg man uses 75 N of force to push on a 500,000 ton wall but it does not move. How much work does he do?
0 J
5,625 J
499,925 J
Not enough information in the question to determine
A body builder uses 13,334 J of work while benchpressing. If he does his reps in 30 seconds, what power did he use during his workout?
(P = W/t)
400,020 W
13,304 W
0.002 W
444 W
In a simple machine, when the force is increased, the distance ______ so the same amount of work is done.
decreases
increases
stays the same
The unit for work is
joule.
joule/second.
newton.
watt.
All simple machines
make work easier.
increase both the force and the distance involved in work.
increase the amount of work done.
decrease the amount of work done.
To do the same amount of work on an object, a small force applied over a long distance can be exchanged by
a small force over a long distance.
a small force over a short distance.
a large force over a short distance.
a large force over a long distance.
What is the BEST explanation for how a simple machine makes work easier?
It allows you to use less force.
It increases the amount of work that is done.
You do the work on the machine, and the machine does work on you.
It allows force to be applied over a greater distance so that less force is needed for the same amount of work, or it changes the direction of the force.
Which type of simple machine is present in the image?
wheel and axle
screw
pulley
wedge
In this image, the blinds are an example of which type of simple machine?
screw
lever
wheel and axle
pulley
A student puts a ruler on top of a pencil. On one end, the student places a book. The student pushes down on the other end of the ruler (opposite the book).
What type of simple machine did the student make to lift the book?
lever
inclined plane
pulley
wheel and axle
What simple machine is the trigger nozzle in the image?
(Number 15 in the image)
inclined plane
lever
screw
pulley
In the image, which TWO simple machines are being used for the student to enter the building?
wedge and wheel & axle
lever and wheel & axle
inclined plane and wheel & axle
lever and pulley
Which simple machine includes an inclined plane?
wheel and axle
screw
pulley
lever
The hammer is being used as which type of simple machine?
inclined plane
wedge
lever
pulley
To separate the stone using LESS force, you should
shorten the wedge.
lengthen the wedge.
increase the friction of the wedge.
increase the width of the wedge.
If you wanted to increase the mechanical advantage of an inclined plane, what should you do?
make the ramp longer
make the ramp shorter
make the ramp steeper
there is nothing you can do to increase the mechanical advantage of an inclined plane
A car jack with a mechanical advantage of 50 N is used to raise a car. If the output force on the car is 5,600 N, what is the input force?
0.009 N
112 N
280,000 N
5,550 N
You need to remove a large rock from your front yard. You find a board and place it over a brick. The boulder is on one side of the board and you push on the opposite end of the board.
What class of lever did you make to move the large rock?
1st Class Lever
2nd Class Lever
3rd Class Lever
4th Class Lever
A hockey stick (like a baseball bat) is which class of lever?
1st Class Lever
2nd Class Lever
3rd Class Lever
4th Class Lever
A wheelbarrow is which class of lever?
1st Class Lever
2nd Class Lever
3rd Class Lever
4th Class Lever
Which of the following are compound machines?
scissors
bicycle
wheelbarrow
baseball bat
Which of the following is NOT a simple machine?
ball
front teeth
golf club
ramp
Levers are divided into classes according to the location of the
effort.
fulcrum.
load.
effort, fulcrum, and load.
All of the following simple machines are represented in the image EXCEPT a
lever.
inclined plane.
pulley.
wheel and axle.
The teacher is moving desks in the classroom. She applies 13 N of force to do 194 J of work. How far did she push the desk?
0.07 m
14.9 m
181 m
2,522 m
