n physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity.
what's motion?
f the position of an object is not changing with relatively to a given frame of reference, the object is said to be at rest, motionless, immobile, stationary, or to have constant or time-invariant position with reference to its surroundings.
what's object?
n common usage, a physical object or physical body (or simply an object or body) is a collection of matter within a defined contiguous boundary in 3-dimensional space.
what's mass?
Mass is both a property of a physical body and a measure of its resistance to acceleration when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies. The basic SI unit of mass is the kilogram.
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