You got the proper tool, such as a screw driver or wrench, and unscrewed it!
Why is it that it's so easy to unscrew with a tool when you can't with your bare hands?
The wrench and screw driver are examples of a wheel and axle, where the screw or bolt is the axle and the handle is the wheel. The tool makes the job easier by changing the amount of the force you exert. Axle Wheel
All of the simple machines can be used for thousands of jobs from lifting a 500-pound weight to making a boat go. The reason why these machines are so special is because they make difficult tasks much easier.
Levers First Class : It has the fulcrum between the effort and the load. Fulcrum: the place where the lever turns
Levers Second Class: the load is located between the effort and the fulcrum.
Levers Third Class: The effort is between the load and the fulcrum.
Exploration: Investigate the Lever – Page 34 Complete Student Logbook Pages 20 and 21
Exploration: Pull It Up A Slope – Page 38 Complete Student Logbook Pages 22 and 23
Exploration: Test a Set of Gears – Page 42 Complete Student Logbook Pages 24 and 25
EXPLORATION: USE A FIXED AND A MOVING PULLEY – PAGE 46 Complete Student Logbook Pages 26 and 27
Technology and You Pages 50 - 53 List and briefly explain 5 ways technology has benefitted your life. List and briefly explain 2 ways technology has affected the environment. Complete Student Logbook Page 28
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