Question

iss mein man ke weight ko kyu add kara ha ? ​

Answer 1

jitni energy hai utna hi work hota hai,

therfore,

energy used = work done

is question mein man apna weight + object ka weight ground pr as a force laga rha hai,

displacement is in upward direction,

ye to pta hoga na weight bhi ek tarah se force hi hai

force= mg

weight too = mg

work done is equal to force multiplied by displacement,

force net =(total mass)*acceleration

f = (70 + 10)*g

f= 800N

disp = 100m

therefore work = 80000 joules