Start to STEM Curriculum Program
Load Lifting
Learning Objectives • Be able to locate the fulcrum on a lever. • Understand the relationship between the location of the fulcrum and the force it takes to lift a load.
Equipment List • LearnLever™ Mini Lever Class Set
Suggested Timing • 45+ minutes
• 4 mini levers • 72 beanbags
SET UP • The lever arm is the piece with the orange and green cups already attached. It has holes underneath which represent the different fulcrum locations possible. • Connect the lever arm to the fulcrum (blue base) with the black hook and loop strap. • Adjust the fulcrum location by moving the lever arm horizontally and aligning the fulcrum base with a different hole on the lever arm. • Adjust the tightness with the strap so that the cups stay upright during the lesson.
Load
Force
Fulcrum
TEACH • Identify the orange cup as the force and the green cup as the load. • Begin the experiment by placing the lever on the fulcrum point closest to the green cup. • Place 5 beanbags in the green cup, representing the load. • One by one, add beanbags to the orange cup to determine the amount of force required to lift the load. • Remove the beanbags from the orange cup, but keep the beanbags in the green cup. Move the lever so the fulcrum is one spot farther away from the load. • One by one, add beanbags to the orange cup to determine the amount of force required to lift the same load with a different fulcrum point. • Continue the experiment by moving the lever so the fulcrum is one spot farther away from the load.
REFLECTION QUESTIONS • How many beanbags are needed to lift the load when the fulcrum is closest to the load? • How many beanbags are needed to lift the load when the fulcrum is two spots away from the load? • As the fulcrum moves farther from the load, is more or less force needed to lift the same load?
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UNIT: Day 2-5 - What is a Lever? | LESSON 3: Load Lifting
Standards-aligned curriculum manual with 10 days of simple machines lessons O B Start to STEM Simple Machines Kits All the equipment needed for hands-on lessons in force, work, and mechanical advantage! Students explore levers and pulleys through the tabletop-sized LearnLever ® Mini Levers, LearnLauncher ® Mini Catapults, and ForceCourse ® Mini Pulley Systems. Students can use spring scales in the InclineInvestigation ™ Kit to determine how ramps are used for mechanical advantage. Use included soft wedges to learn about minimizing force to separate items. Lastly, explore wheels and axles through gears using the RatioReveal ™ class set featuring different-sized gears and lesson direction to guide up to 24 students through calculating gear ratio. Follow along with the
Comprehensive equipment pack for 24 students
comprehensive manual that outlines 10 days of lessons that align with Next Generation Science Standards. Lessons are scalable according to grade level and student ability. Choose the ideal configuration for your program! Complete Pack includes it all: equipment, manual, and a live virtual training. Equipment and Manual are available together or separately. Full contents list online. Recommended for Elementary and up. TM36-876 Complete Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pack $ 4,299.00 TM36-864 Equipment and Manual .. . . . . . . . . .......... Pack $ 2,799.00 TM36-865 Equipment Only . . . . . . . . . . . . . .............. Pack $ 2,699.00 TM36-866 Manual Only . . . . . . . . . . . . . . . . .................. Ea $ 125.00
^ *For full CHOKING HAZARD descriptions, see page 136.
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