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When is Work Done on an Object? Physics Explained!

When is work done on an object?

A.

when a force is applied to an object and the object remains stationary

B.

when the frictional force on an object is greater than a force applied to the object

C.

when two forces of equal magnitude are applied to the object in opposite directions

D.

when a force is applied to an object and the object moves in the same direction as the force

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Answer

Ah, the age-old question: when is work done on an object? Well, let me tell you, it's not when you're just sitting there looking pretty (although, let's be real, you're probably doing that too).

Work is done when a force is applied to an object, and the object moves in the same direction as the force. Yep, you guessed it - option D is the correct answer! When a force is applied, and the object moves in the same direction, that's when work is being done.

  • Option A is incorrect because even if a force is applied, if the object remains stationary, no work is being done.
  • Option B is also incorrect because frictional force doesn't necessarily mean work is being done - it just means there's resistance!
  • And option C is a big no-no because equal forces in opposite directions just mean the object is stuck in a stalemate - no work is being done here!

So, there you have it! Now go forth and do some work (on an object, of course)!

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