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Physical Science Unit 3 Warm-Up

Physical Science Unit 3 Warm-Up. Work, Power and Simple Machines. Wednesday 9/18/13. Define Work Give an example of work Turned in on Tuesday Unit 2 review, remember you MUST have shown work for math problems b/c I gave out answers. 9/19/13. Label the following as work or not work

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Physical Science Unit 3 Warm-Up

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  1. Physical Science Unit 3 Warm-Up Work, Power and Simple Machines

  2. Wednesday 9/18/13 • Define Work • Give an example of work • Turned in on Tuesday • Unit 2 review, remember you MUST have shown work for math problems b/c I gave out answers.

  3. 9/19/13 • Label the following as work or not work • Sliding a box across the floor • Lifting the box • Carrying the box to the next room • Lowering the box to the floor • Holding 200 lbsbox over your head

  4. 9/20/13 • Use your formula sheet to write the equation that would go with the following units. HINT: first look at what each unit measures. • Kg, N • mL, g • s, m • W, s • m, N • m/s2, s

  5. 9/23/13 • EOCT review • How long does it take for a car that traveled 25 m to reach a speed of 15.25m/s?

  6. 9/24/13 • Have out “Simple Machine Practice” • Identify the simple machine that is in the complex machine below • Screw Driver • Stage Curtains • Flight of stairs • Nail • Hammer putting in a nail • Shovel

  7. 9/26/13 • Quiz Friday: • How much power is used if it take 25 N of force to move box 13.5 m in 45 seconds?

  8. 9/30/13 • Turn in Chapter 14 Vocab Review at the start of the period. • Warm-Up • How much time does it take to use 375 watts of power if 285 J of work was done?

  9. 10/1/13 • What is a compound machine? • Why is efficiency of a machine always less than 100 %?

  10. 10/2/13 A crane lifts a 875 N load a height of 15 m in 95 s. What is the power of the crane? Warm-Ups Due today. From 9/18/13 to 10/2/13 should have 9 warm-ups. Questions are on teacher web-page if you’ve lost your answers

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