A man weighing 50 kg lifts a weight of 30 kg to the top of building 10 m high. Find the work done by him. Take $g=9.8m/s^2$

Q. A boy weighing $50kg$ climbs up a vertical height of $100m$. Calculate the amount of work done by him. How much potential energy does he gain ($g=9.8m/s^2$)

Q. A man of mass $60kg$ climbs up a $20m$ long staircase on the top of a building $10m$ high. What is the work done by him? $(Takeg=10m{s}^{-2})$

Q. Find the work done by a man weighing $140kg$ and carrying $20kg$ load to the top of a ladder $16m$ long making an angle of ${30}^o$ with the horizontal$g=9.8m/s^2$

Q. Find the work done in lifting $5$ cement bags, each of mass $25\text{kg}$ to the top of a building of height $50\text{m}$.(consider $g=10m/s^2$)