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a constant force.
momentum
It has an attractive force somewhat similar to a magnet and metal. But, the force (acceleration) of gravity is still not understood.
Constant acceleration. Note that all orbits approximate this condition.
constant velocity
a constant force.
momentum
There's no such thing as "an unbalanced force". When the entire group of forces acting on an object is unbalanced, the object accelerates, in the direction of the vector sum of the forces.
It has an attractive force somewhat similar to a magnet and metal. But, the force (acceleration) of gravity is still not understood.
The force on a body determines its acceleration, speed depends on how long the acceleration lasts. Wind resistance and road friction (or other mechanical drag) will affect the power required to maintain a certain speed.
Constant acceleration. Note that all orbits approximate this condition.
Not exactly.Force is used to create motion.Mass is a description of an object, that's used to predict what kind of motionthe force on it will create.Acceleration is the description of the motion created by the force.
What kind of acceleration sensor are you referring too?
Friction always mimics a force in a direction exactly opposite to the object's motion. So its effect is always to rob the moving object of speed, velocity, kinetic energy, and momentum.
Negative acceleration.
constant velocity
Not necessarily. In our atmosphere, of course, we have friction due to the object displacing air, or if it is moving on some kind of wheel we have bearing friction, wheels (or what-have-you) against the road surface, etc. If the path or speed of the object is changing, then there is a force acting on it. Like the space station orbiting the Earth.