Question

Lift 100g and 1kg weights to a height of 1 m above the table. You will do 1J and 10J work. Explain how it was calculated.

Answer 1

for the $1J$ work

work done $=mgh=100/1000\times10\times 1=1J$

for the $10J$ work

work done $=mgh = 1\times 10 \times1=10J$