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Work and Not Work

Vocabulary/Example Problems

TermDefinition
When is something considered work? An object moves in the direction of a force acting on it.
How is energy transferred when work is done? Energy is transferred from the object/person/force to the object that work is being performed on. Such as pushing someone down the stairs. Energy is transferred from you to the other person, doing work to cause the other person pain.
Example 1: Hitting a home run in baseball. Is it considered work or not work? Yes, this is an example of work. The ball moves in the direction of the force applied by the baseball bat.
What is the formula for work? W= F x d (Work=Force x direction)
Example 2: Attempting to push an extremely massive boulder out of the middle of the road. You apply a lot of force, but the boulder still blocks your path. Are your efforts considered work or not work? No, this is not an example of work. There was force applied, but unless the object moved in the direction of the force, it is not considered work.
Example 3: Pushing buttons on a keyboard. Each beautiful stroke to complete your essay that you waited for the last second to write. Is this action considered work or not work? Yes, this is considered work. You make the buttons go down when you apply a force with your fingers to push them down.
Example 4: Picking up a ten dollar bill from the ground. Lucky you! Is this considered work or not work? Yes, this is considered work. The ten dollar bill was lifted in the direction of the force that was you picking it up.
Example 5: Carrying a backpack. You're walking and it's just going with you on your back. Work or not work? No, this is not an example of work. Although the backpack is moving, it isn't moving in the direction of a force applied to it. You're not pushing or pulling it, just carrying it.
Created by: DIANA MEHHH