The total weight of the load is (mass) x (gravity) x (height) .
Weight = (520 x 4kg) x (9.8 m/s²)
Weight = (2,080 kg) x (9.8 m/s²)
Weight = 20,384 newtons
Work = (force) x (distance)
Work = (20,834 N) x (15 m)
Work = 305,760 Joules
Answer:
W = 305760 J
Explanation:
Force required to pull each brick is given as
[tex]F = mg[/tex]
here we know
m = 4 kg
[tex]F = (4kg)(9.8 m/s^2)= 39.2 N[/tex]
now work done to bring one brick to height of 15 m
[tex]W = F.d[/tex]
[tex]W = 39.2 \times 15 = 588 J[/tex]
Now company has to transfer total 520 bricks
so total work done is given as
[tex]W = 520 \times 588 J = 305760 J[/tex]
