define force write its unit and explain kinds of with example
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In 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.
The unit of the force is Newton.
There are two kinds of forces:
Contact Forces - involve physical contact between objects. Examples: the force involved in kicking a ball, pulling a wagon, compressing a spring, etc.
Field forces - don't involve physical contact between objects. Examples: the gravitational force and the electromagnetic force.
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