Everything Science Grade 12
CHAPTER 7. MECHANICAL PROPERTIES OF MATTER 7.4 Materials have the following mechanical properties to a greater or lesser degree ...
7.4 CHAPTER 7. MECHANICAL PROPERTIES OF MATTER (c) copper and tin Do some research on what added substances can do to the prope ...
Work, Energy and Power 8 8.1 Introduction Imagine a vendor carrying a basket of vegetables on her head. Is she doing any work? O ...
8.2 CHAPTER 8. WORK, ENERGY AND POWER the displacement. Workis calculated as: W = F· Δx cos θ. (8.1) where F is the applied forc ...
CHAPTER 8. WORK, ENERGY AND POWER 8.2 A rocket acceleratesthrough space. A waiter holds a trayfull of meals above his head with ...
8.2 CHAPTER 8. WORK, ENERGY AND POWER Example 1: Calculating Work Done I QUESTION If you push a box 20 mforward by applying a fo ...
CHAPTER 8. WORK, ENERGY AND POWER 8.2 applying a force of 40 Ndirected up the slope, but it slides downhill 30cm? SOLUTION Step ...
8.2 CHAPTER 8. WORK, ENERGY AND POWER Example 3: Calculating Work Done III QUESTION Calculate the work done on a box, if it is p ...
CHAPTER 8. WORK, ENERGY AND POWER 8.2 applied force parallel tothe ground is F|| = F· cos(60◦) = 10 N· cos(60◦) = 5 N Step 4 : S ...
8.2 CHAPTER 8. WORK, ENERGY AND POWER A 20 N object is sliding at constant speedacross a friction free surface for a displaceme ...
CHAPTER 8. WORK, ENERGY AND POWER 8.3 A student with a mass of 60 kg runs up three flights of stairs in 15s, covering a vertica ...
8.3 CHAPTER 8. WORK, ENERGY AND POWER Etotal,A = KEA+ PEA = 1 2 mv^2 A+ mghA = 1 2 mv^2 A+ mg(0) = 1 2 mv^2 A Etotal,B = KEB+ PE ...
CHAPTER 8. WORK, ENERGY AND POWER 8.3 Capacity to do Work ESCEF Energy is the capacity todo work. When positivework is done on a ...
8.3 CHAPTER 8. WORK, ENERGY AND POWER Calculate the workdone by the hammer, W 1 , when dropped from h 1 using: W 1 = Fg· h 1. ...
CHAPTER 8. WORK, ENERGY AND POWER 8.3 DEFINITION: Work-Energy Theorem The work-energy theorem states that the workdone on an obj ...
8.3 CHAPTER 8. WORK, ENERGY AND POWER The brick had 98 J of potential energy when it was released and 0 J of kinetic energy. Whe ...
CHAPTER 8. WORK, ENERGY AND POWER 8.3 force applied by the brakes, and we can use: W = F· d to determine the stopping distance. ...
8.3 CHAPTER 8. WORK, ENERGY AND POWER Extension: Other forms of PotentialEnergy elastic potential energy - potential energy is ...
CHAPTER 8. WORK, ENERGY AND POWER 8.3 resources, listing advantages and disadvantages of each type. Writeup the results as a sho ...
8.4 CHAPTER 8. WORK, ENERGY AND POWER A B C v h Calculate the speed ofthe pendulum when itreaches point B (the equilibrium point ...
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