1M10.16 - Lift or Carry a Block

Lift a block off a table and discuss that work is only done when you are lifting the block and not when you are carrying it around at the same horizontal height.
Code Number:
1M10.16
Demo Title:
Lift or Carry a Block
Condition:
Good
Principle:
Work
Area of Study:
Mechanics
Equipment:
A large block or book.
Procedure:

Lift a block off a table and discuss that work is only done when you are lifting the block and not when you are carrying it around at the same horizontal height.

References:
  • Carl E. Mungan, "Negative Work Done by a Person", TPT, Vol. 53, # 4, April 2015, p. 224.
  • Borislaw Bilash II, David Maiullo, "Work is Going My Way", A Demo a Day: A Year of Physics Demonstrations, p. 78.

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