A boy of mass 55 kg runs up a flight of 40 stairs each measuring 0.15m. Calculate the work done by the boy?

srisaji@yahoo.com

Mass of the boy (m) = 55 kg
Height of each stair = 0.15m 
acceleration due to gravity = 10 m/s2
Total height moved by him (h) = 40 x 0.15 m = 6.00m 
Work done by him in moving against gravitational pull = mgh = 55 x 10 x 6= 3300 J 
 

  • 19
What are you looking for?