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Car acceleration decrease when speed rise (even if aero/tire drag is zero), because thrust force decrease. Torque at wheels are smaller...

When I run is harder, but when I run I use more power , my leg rpm is higher and my force push on each stair is higher.

In case of bike, lets say my foot push on pedals only in half circle, when I am above pedal so my weight ( mg) make force on pedals. How...

When I decrease F and use higer gears ratio, I can incease my speeed, but my power still remain the same. Is my example with horse...

Consider an object falling in vacuum under a constant gravitational force. The rate that kinetic energy is gained by the object...

One thing is work performed by the horse, and a different one is the time in which that work is done. Less time requires greater power...

Imagine if car travel in different medium so at 100km/ and 200km/h is same drag force at car. It turns out that car that travel at...

Power = Force v Speed Power of my horse = 104kgx9.81m/s^2 x 0.732m/s = 1HP =746W Force/tension in rope stay the same if horse run at...

You mean point where cruves from lower and higher gear intercept? yes here torque at wheel are the same

Torque at wheel is smaller in 4th gear then in 3rd gear, acceleration is smaller in 4th gear compare to 3rd gear.

In one gear (ex. in 3rd gear), max torque on wheel(max thrust=max acceleration) is not at engine max power, it is on engine max torque...

Yes manfacturer do that based on some calculation, they do this to get max acceleration. But if they add few more gears and make them...

Optimal rpm window is "power band" or "rpm power window" that engine use for max acceleration. you can see this engine operate in rpm...

Yes that is instatenuos acceleration for that specific rpm, but power and torque change in my operating rpm window, so called "power...

Thanks. I choose random photo from net. We can look at this, just assume both have same max power. Is there any advantge for engine...