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WorksheetsPOE Unit 1.1
Total questions: 12
Worksheet time: 6mins
Which of the following is not one of the six simple machines?
inclined plane
screw
pulley
gear
wheel and axle
On a third class lever the load was unknown but the distance to the load was five feet. The distance to the effort was one-half foot and the effort was five hundred pounds. What was the load?
5 pounds
5000 pounds
500 pounds
50 pounds
In a second class lever, where is the effort?
It is at the end opposite the fulcrum, with the load in the middle.
It is in the middle, between the load and the fulcrum.
It is at the end opposite the load, with the fulcrum in the middle.
It is at the same place with a third class effort.
The screw is a combination of which two other simple machines?
the wheel and axle and the lever
the inclined plane and the wheel and axle
the lever and the pulley
the wedge and the wheel and axle
A lever has a mechanical advantage of 0.78. Which class lever could it NOT be?
Class 1
Class 2
Class 3
Class 4
A worker is lifting a wheelbarrow folding fifty pounds of crushed concrete. If the load is 1.5 feet from the fulcrum and the worker is hold the handles six feet from the fulcrum, what mechanical advantage is obtained by using the wheelbarrow?
9
0.25
4
7.5
Football players doing push-ups represents which class of lever?
1
2
3
4
If 1000 Newtons is needed to lift 45.08 Newtons, what is the mechanical advantage?
1
22.183
45,080
0.045
An inclined plane with a vertical height of one yard and a slope of three yards is used to move a box of 735 pounds. What effort is required to push the box up the ramp?
735 lb
367.5 lb
2205 lb
245 lb
Can a pulley have an IMA of 7.5?
Yes
No
Find the mechanical advantage of a screw with a head diameter of 0.25 inches and 18 threads per inch is a screwdriver with a 1.5-inch diameter is used to install it.
84.823
27
14.137
4.5
A pulley has one cable used to pull down for the effort and three cables used in the block and tackle. What is the maximum possible weight lifted if 195 pounds of force is used to pull down the cable?
65 lb
195 lb
585 lb
780 lb
