Date post: | 22-Dec-2015 |
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Warm up• Come in quietly, get your journal from the
appropriate bin, complete the following on the next available page:
• Draw the force diagram of Susie pushing her bike to the left with 400 N of force, and Roger pushing his bike to the right with 800 N of force. (Remember arrow size and direction)
• Draw the force diagram of a falling bowling ball weighing 20 N (Remember gravity is a force).
Standards
• S8P3b. Demonstrate the effect of balanced and unbalanced forces on an object in terms of gravity, inertia, and friction.
Daily Goals
• Explain how friction works• Give examples of the two types of friction• Explain how friction can be helpful and
harmful
Important
• Test Friday, Nov. 18• Practice Sheet #12 due Friday, Nov. 18• Study Guide due Friday, Nov. 18 for extra
credit
Types of Friction
• Two main types of friction– Static friction – occurs when a force is applied to
an object but does not cause motion– Kinetic friction – Friction between moving surfaces
Warm Up
• Come in quietly, get your journals, and have a seat.
• Open your journals and complete the writing prompt “A World without Friction”
• You have ten minutes to be finished. (Not just starting, but completely finished. Finished means several complete sentences addressing the prompt). For a grade.