Answer:

Conceptual:
What is work?
Work is simply the transfer of work over a displacement. Work is a Newton-meter which is called a Joule, J. Work can be calculated using the following formulas.

The angle "θ" is the angle between the force applied and the direction of displacement.
What is power?
Power is the amount work done per second, which is a J/s, and this is clumped together to create a Watt, W. Power can be calculated using the following formula.

Step-by-step explanation:
Given that an engine does 400 J of work in 10 seconds. Find the power of the engine.

Plug these values into the formula for power.

Thus, the engines power is calculated.