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Check. Forces in everyday life
EduBook Organización
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Remember what you have studied in this section and answer the questions: Give three examples of when friction acts. In each case, state whether the friction is an advantage or a disadvantage. What is…
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Learn. Simple machines - Obtaining and using energy
EduBook Organización
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Simple machines The most rudimentary machines are called simple machines. They are basic, but they are of great help in performing tasks and transferring energy. The Wheel A wheel is a circular object…
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Final Autoevaluation T07 04 - Energy inside the Earth
EduBook Organización
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Choose the correct word to complete the sentence: Earthquakes caused by the friction of rock masses are called... Tectonic earthquakes are of magnitude... The frequency of volcanic earthquakes is... The…
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Check. Test yourself
EduBook Organización
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Remember what you have studied in this unit and answer the questions: Are average velocity and instantaneous velocity the same? When? Why? What effects do forces produce? Give several examples of these…
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True and False. Equilibrium
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Answer true or false: An object is in equilibrium when the sum of the forces acting upon it is equal to zero. If an object is in equilibrium it cannot be moving. A block at rest hanging on the cable of…