Simple Machines Worksheet
List all six simple machines and give an example of each one.
1)
2)
3)
4)
5)
6)
7) What is a simple machine?
8) Effort force is opposed by the ____________ force.
9) What is a compound machine?
10) What is mechanical advantage (MA)?
11) A pulley has a mechanical advantage of 3. How much force is needed if the
pulley is used to lift a 330 N weight?
12) A man expends 100 J of work to lift a box with a pulley . The amount of work
produced is 80 J. What is the efficiency of the pulley?
13) If it takes 30 N of force to lift a child sitting on one end of a seesaw who has
a resistance of 45 N, what is the MA of the seesaw?
14) Using a lever, a person applies 60 N of force and moves the lever 2 m. This
moves a 200 N rock at the other end by 0.2 m. What is the efficiency of the
lever? (Hint: this is a two-part problem. 1st-find the Win. 2nd- find the Wout.
Finally, find the efficiency.)
For the following pictures, identify the type of simple machine used.
15)______________
16)_____________
17) _____________
18)_____________
19)_____________
20)_____________
21)_____________
22)_____________
For the following pictures, classify the levers as first, second, or third class.
23)________________
24)_______________
25)_____________