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Unit 5 Work, Power, and Energy
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Work (W) Work is done on an object when a force is applied and the object moves W = Fd Unit for work: kg•m2/s2 or Joule (J)
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Work is done only when the components of a force are parallel to a displacement
W = Fd(cosΘ) Wnet = Fnetd(cosΘ)
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Work is a scalar quantity
Can be positive or negative Positive if your applied force and direction of movement are the same Ex. Pushing a vacuum Pulling a wagon Negative if your applied force is opposite of the direction of movement Ex. Pushing against a remote control car that is going forward Pulling against a remote control car that is going in the opposite direction
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How much work is done on a vacuum cleaner pulled 3
How much work is done on a vacuum cleaner pulled 3.0 m by a force of 50.0 N at an angle of 30.0° above the horizontal?
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