Question

A man having his own mass 60 kg, climbs up 20 m height with a bucket having water of mass 15 kg. so, work done is ..... kJ (g = 9.8 m/s2) (A) 15 (B) 20 (c) 150 (D) 1.5

GSEB - Class 9 Chapter - 1. Work, Energy and Power Page 9

Answer 1

total force is =75*9.8. ( 60 it's own mass 15 water mass total downloads force 60+15=75)
displacement 20n
w=f*s=75*9.8*20=14700
apparoximatly 15Kj

Answer 2

the answer is 150 c) option