Activity: Name That Force Content Objectives: -construct a free body force diagram correctly labeling all forces acting on an object -use free body diagrams to determine a net force acting on an object Instructions: read and perform each activity. Sketch a free-body force diagram AND determine an expression for the NET FORCE from your force diagram. 1. Stand on your chair. What forces are acting on you when you stand on your chair? Draw a picture of yourself standing on a chair. Draw labeled arrows to show each force acting on you. Determine an expression for the net force from your diagram.
2. Step off your chair. What forces are acting on you while you are falling, but before you land? Draw a picture of yourself falling off a chair. Draw labeled arrows to show each force acting on you. Determine an expression for the net force from your diagram.
3. What forces are acting on you when you land? Draw a picture of yourself landing. Draw labeled arrows to show each force acting on you. Determine an expression for the net force from your diagram.
Checkpoint!___________ (teacher initials) 4. Sitting in a rolley-chair, push against a wall. What forces are acting on you when you push against the wall? Draw a picture of yourself pushing the wall. Draw labeled arrows to show each force acting on you. Determine an expression for the net force from your diagram.
5. (Rolley-chair continued…) What forces are acting on you AFTER you stop pushing the wall, but while you are still moving? Draw a picture of yourself moving AFTER you’ve pushed the wall while in the rolley-chair. Draw labeled arrows to show each force acting on you. Determine an expression for the net force from your diagram.
6. While in a rolley-chair, push up against another person in a rolley-chair. What forces are acting on you when you push against your partner? Draw a picture of yourself pushing your partner while in the chair. Draw labeled arrows to show each force acting on you. Determine an expression for the net force from your diagram.
7. While in a rolley-chair, push up against another person in a rolley-chair. What forces are acting on you AFTER you stop pushing your partner, but while you are still moving? Draw a picture of yourself moving AFTER you’ve pushed your partner. Draw labeled arrows to show each force acting on you. Determine an expression for the net force from your diagram.
8. Get out of the rolley-chair. Push against a wall again. Why don’t you move backward this time? Draw a picture of yourself while pushing the wall. Draw labeled arrows to show each force acting on you.
Follow-Up Questions: 9. When you are swimming, what force propels you forward in the pool? 10. When you jump, what force propels you upward? 11. CHALLENGE. If you were floating in space, how can you move yourself forward? Essential Questions: (These are to be answered as type 2 Collin’s writing on a separate attached sheet. They will be graded for completeness, correctness and connection to the minilab. These are worth 1 pt each, the rest of the minilab is worth 3pts for completeness) 1. What is meant by the term net force? 2. How can free-body force diagrams be used to determine a net force?
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