posted by maddie on .
A hallway display of energy is constructed in which several people pull on a rope that lifts a block 1.15 m. The display indicates that 1.05 J of work is done. What is the mass of the block?
The weight is
Work/(lift distance) = 0.946 Newtons
Divide by g for the mass in kg.
That's only about two pounds.
Not much of a display. They certainly didn't need three people for that.
Are you sure you got the decimal point right for theWork in Joules?