Question

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

a. If the task takes him 20 seconds to complete, how much power did he produce?"
(a) The worker does 20.9 joules of work.
(b) The worker produces 20.9 watts of power.
(c) The worker does 2090 joules of work and produces 104.5 watts of power.
(d) The worker does 2090 joules of work and produces 20.9 watts of power.

Answer 1

The worker does 2090 joules of work by applying a force of 209 N over a distance of 10 m, and he produces 104.5 watts of power over 20 seconds.

Step-by-step explanation:

The amount of work done by the worker can be calculated using the formula Work = Force × Distance. In this case, the worker pushes with a force of 209 N over a distance of 10 m. Therefore, the work done is:

Work = 209 N × 10 m = 2090 Joules

Next, to find the power produced by the worker, we use the formula Power = Work / Time. With the work done as 2090 Joules and the time taken being 20 seconds, the power is calculated as:

Power = 2090 Joules / 20 seconds = 104.5 Watts

Thus, the correct answer is (c) The worker does 2090 joules of work and produces 104.5 watts of power.