Question

a moving company is called into a building and asked to relocate 520 bricks to a location 15 meters above the ground if each brick is 4 kilograms what amount of work will be needed to accomplish the task

Answer 1

Work done to lift one brick = 4 Kg x 9.8 m/sec 2 x 15 m = 588 Joules. Then work done to lift 520 bricks = 520 x 588 = 305.760 j

Answer 2

Wow ! I'm sweating just thinking about it.

The amount of work required is the additional potential energy

that the bricks will have when they're all up at the higher location.

Increase of potential energy = (mass) x (gravity) x (increase in height)

The total mass is (520 bricks) x (4 kg/brick) = 2,080 kilograms

Potential energy = (2,080 kg) x (9.8 m/s²) x (15 m)

Potential energy = 305,760 Joules.

Grab your hat, put on your sunscreen, and get busy.