3. what is the difference between force, work, power, and energy? 4. what are the strokes in a four - stroke…

Brief Explanations:

Force is a push or pull on an object. Work is done when a force causes an object to move in the direction of the force, calculated as $W = F\times d\times\cos\theta$ (where $F$ is force, $d$ is displacement and $\theta$ is the angle between them). Power is the rate at which work is done, $P=\frac{W}{t}$ (where $t$ is time). Energy is the ability to do work, with different forms like kinetic and potential. In a four - stroke internal combustion engine, the four strokes are intake (draws in fuel - air mixture), compression (compresses the mixture), power (ignition causes expansion and does work), and exhaust (expels exhaust gases).

Answer:

Force is a push/pull, work is force - induced displacement, power is work rate, energy is work - doing ability. Four - stroke engine strokes: intake, compression, power, exhaust.