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 Energy 40 Flashcards |
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What is the formula for calculating work done by a force? |
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Work done = Force × Distance moved in the direction of force, W = F × d |
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Which of the following units is used to measure work? A) Joule B) Newton C) Meter D) Watt |
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A) Joule |
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Riddle: I can be stored in a stretched bow or a lifted stone. What energy am I? |
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Potential energy |
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True or False: Work is done when a force is applied but the object does not move. |
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False. No work is done if there is no movement of the object. |
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The energy of a body due to its motion is known as ______. |
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Kinetic energy |
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What is the S.I. unit of power? |
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Watt (W) |
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If a cyclist pedals and the bicycle moves, what is the work done on the bicycle classified as? |
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Work is classified as done since the bicycle changes its position. |
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Which type of energy is associated with an object's height above the ground? |
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Gravitational potential energy |
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Riddle: I can change from mechanical to electrical, but I'm not a transformer. What am I? |
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A generator |
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True or False: The total mechanical energy of an object remains constant if there is no friction. |
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True. Mechanical energy is conserved in the absence of friction. |
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Fill in the blank: The capacity of a body to do work is defined as ______. |
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Energy |
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Which of the following factors does NOT affect kinetic energy? A) Mass B) Speed C) Distance moved D) Both A and B |
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C) Distance moved |
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What is the relationship between power, work done, and time taken? |
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Power = Work done ÷ Time taken |
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Riddle: I can be converted into light, sound, or heat, but I am not a solid. What am I? |
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Energy |
Card: 28 / 40 |
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Fill in the blank: The work done on a body is stored as its ______. |
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Energy |
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What happens to potential energy as an object falls? |
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It decreases and is converted into kinetic energy. |
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True or False: The unit of energy is different from the unit of work. |
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False. The unit of energy is the same as that of work, which is joule (J). |
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What is the expression for gravitational potential energy? |
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Gravitational potential energy = m × g × h |
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Which of the following is NOT a form of energy? A) Heat B) Sound C) Friction D) Light |
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C) Friction |
Card: 38 / 40 |
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Riddle: I am the rate at which work is done, measured in watts. What am I? |
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Power |
Card: 40 / 40 |
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Completed! Keep practicing to master all of them. |
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