Question

calculate the work done against gravity of coolie in carrying a load of mass 10 kg on his head when he walks uniformly a distance of 5m in the vertical direction and horizontal direction

Answer 1

mass=10kg

height/distance= 5m

here we have to find potential energy as potential energy is defined as work done against gravity

P=mgh (take g=10m/s^2)

P= 10*5*10

P=500J

hene work done against gravity is 500J