Question

A worker uses a cart to move a load of bricks weighing 680 N a distance of 10 m across a parking lot. If the worker pushes the cart with a constant force of 209 N, what amount of work does he do?

Answer 1

The answer is 2090 Joules

Step-by-step explanation:

There are several things we need to assume in order to explain this:

• The cart and the load it carries will act as a unit load, meaning it behaves like a dot of 680N
• There is no friction between the cart and the floor
• The force applied by the worker is perpendicular to the floor.
• The floor is leveled

I know this sounds like over-complicating things, but bear with me.

We make all those assumptions because the formula for Work is:

`W=F*d`

Work would be the net sum of Forces (thus the assumptions made before) times the distance (d).

W = F * d = 209 N * 10 m = 2090 Nm = 2090 J

J is Joules, the measuring unit of work

Answer 2

Work= Force x Distance = 220 N x 10 m = 2200 N.m = 2200 J
Work= 2200 J