EXPLORATION: HOW DOES A PENDULUM MOVE? - PAGE 18 Complete Student Logbook: Pages 7, 8 and 9
Friction What is friction?
EXPLORATION: WATCH IT ROLL. WATCH IT SLIDE - PAGE 22 Complete Student Logbook: Pages 10, 11 and 12
Complete Student Logbook: Page 13,14 and 15
SIMPLE MACHINES Video
Wedge Inclined Plane Screw Wheel and Axle Lever Pulley
Simple machines are useful because they can make a physical job easier by changing the magnitude or the direction of the force exerted to do work.
Have you ever tried to unscrew a nut, bolt, or screw from something with your bare hands and discovered that it was just too tight to loosen even if you had a good grip?
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.
Fulcrum Load Click Here to Learn More
Click on the dude to learn more.
A screw is an inclined plane wrapped around a post. Click on the light bulb to learn more.
Two inclined planes make a wedge. Try to catch the saw to learn more.
Axle Wheel Click on the windmill to learn more.
Wheel Rope This box is easier to lift because of the pulley. Click on it to learn more.
Have you learned it all yet? Let’s look at a worksheet to see. Click Here
Complex Machines Machines made from putting two or more simple machines together
EXPLORATION: BUILD A LIFTING MACHINE - PAGE 30 Complete Student Logbook Pages 15, 16 and 17
Homework Assignment Complete Student Logbook Pages 18 and 19
Levers There are three classes of levers:
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 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