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 Work & Energy 34 Flashcards |
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What is the formula for work done when force and displacement are in the same direction? |
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W = Fd |
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Fill in the blank: The unit of work is called a ______. |
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Joule |
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True or False: The work done by a force depends on the path taken. |
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False. The work done by conservative forces depends only on the starting and ending points. |
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Riddle: I am the energy stored due to an object's position or shape, recoverable when needed. What am I? |
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Potential Energy |
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What is the relationship between kinetic energy (K) and work done on an object? |
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Work done equals the change in kinetic energy: W = ΔK. |
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Fill in the blank: The formula for gravitational potential energy is W = ______. |
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Mgh |
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Which of the following is a unit of power? A) Newton B) Joule C) Watt D) Meter |
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C) Watt |
Card: 14 / 34 |
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True or False: Kinetic energy can be negative. |
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False. Kinetic energy is always positive or zero. |
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Riddle: I'm a force that, when applied, leads to stored energy in a spring, yet I act without a path. What am I? |
Card: 17 / 34 |
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Conservative Force |
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What is the spring constant represented by in the formula F = kx? |
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K |
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Fill in the blank: The equation for power can also be expressed as P = ______. |
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Fv |
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Which of the following describes a conservative force? A) Friction B) Tension C) Gravitational force D) Normal force |
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C) Gravitational force |
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True or False: The potential energy of a spring depends on the path taken to stretch it. |
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False. It depends only on the displacement from its undeformed position. |
Card: 26 / 34 |
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Riddle: I am the measure of how fast work is being done, expressed in Joules per second. What am I? |
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Power |
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What does the symbol θ represent in the work formula W = Fd cos θ? |
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The angle between the force and displacement vectors. |
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Fill in the blank: The total mechanical energy of a system is the sum of ______ and ______. |
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Kinetic energy and potential energy |
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What happens to potential energy when work is done against a conservative force? |
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It is converted into kinetic energy. |
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Completed! Keep practicing to master all of them. |
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