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Starter:

This activity involves calculating the net force of different situations and matching units with their correct measurements. It also includes reading a passage about work and power and solving related word problems.

mindylehman
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  1. Starter: Directions: Calculate the NET force of each box. Situation A: ____ N Situation B: ____ N Situation C: ____ N Situation D: ____ N

  2. Review: Directions: Match the units on the right with the correct measurement on the left. 1. F = __________________ 125 kilograms 2. m = _________________ 23 kgm/s 3. a = __________________ 3 m/s2 4. v = __________________ 29 meters/sec 5. d = _________________ 228 meters 6. p = __________________ 6 newtons

  3. Work and Power Reading Passage • Directions: Read the passage about work and power. After reading the passage draw the following table. (Not the information in the bottom blocks. This is only an example) Vocabulary Word and Definition Formula, Triangle, Unit, Facts • Speed=distance/time • S=d/t • Unit=m/s • How fast you move • How slow you move • Moving Car Speed The distance and object travel in a given time.

  4. Work The force is being applied from the left. The force causes the object to move a distance. Work is being conducted.

  5. Work Word Problem A man pushes a box with 100 newtons of force. The box moves 5 meters. What is the work? F=100N d=5m W=? W=F(d) W=100N (5m) W=500 N.m

  6. Is work present?

  7. Is work present?

  8. Is work present?

  9. Power

  10. Horsepower

  11. More or Less Amount of Work • You use more force to move an object. • You lift a 20N object faster. • You raise an object a shorter height. • You move a lighter object. • You move an object farther.

  12. Is the person doing work? 1. When pushing a 1000N car 20 meters? 2. When lifting a rock off the ground? 3. When holding a book in their hands? • When pushing hard against a brick wall? • When walking up the stairs?

  13. KWFL: Work and Power • You move a 20 Newton object 5 meters. How much work did you do? • You carry a 20 Newton bag of dog food up a 6 meter flight of stairs. How much work was done? • You do 15 Joule of work in 3 seconds. How much power do you use? • You do 25 Joule of work in 5 seconds. How much power do you use?

  14. Exit Slip: Work Draw a real life example of Work. Draw and label arrows to show the force and distance.

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