Problem:
You try to lift a block of concrete that has a mass of 80 kg, and you end up producing 700 newtons of upward force on the block. You do not have any help from levers or pulleys or other machines.
Required:
Question 1: How high (if at all) did you manage to lift the block?
Question 2: Is the muscle contraction isometric or isotonic?
Question 3: How much external work did your muscles do on the concrete block? (in joules)
Question 4: Is internal work done by the muscles during the lift attempt? In what way?
Any help would be appreciated !!!