YES
It can.
Agility
Your body position is easier at about the head, not to high for your arms, not to low.
Stimulants affect the human body in several different ways. When a stimulant is ingested it can cause the heart to speed up and pump more blood throughout the body.
it doesn't because omeostasis is when your body is in a natural normal position.
The body observing the force is either in stationary position or rotates with constant speed.
Depending on the engine, on the throttle body, there are two sensors. One is the throttle position sensor, and the other is the idle air control valve. Usually the latter can be cleaned if your car is experiencing stalling, but both can greatly affect the idle speed
you're body weight builds momentum which accelerates the speed and or distance
The speed of passage of the x-radiation through a body depends on density.
It does affect birds by the speed of the making it lose its body heat but not enough to hurt the birds.
As far as I know it shouldn't affect top speed (assuming that is the question). Weight will affect acceleration and therefore speed after a given amount of time or distance. An example would be 1/4 mile times at a race track. But top speed should be governed primarily by the wind resistance of the body, horsepower of the engine, and the overall gear ratio in top gear. Weight may affect rolling resistance slightly and therefore affect top speed but I suspect this affect would be negligible.
The age of a horse affects the speed of the horse because like a human with age the body has experienced wear, and does not repair itself as well.