Question

what is a force and its si unit,

Answer 1

Force is that agent that changes or tends to change the motion or speed of moving/resting body. SI unit is Newton (N). CGS unit is dyne. 1 N=10 to power 5

Answer 2

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.
SI unit- newton(N)
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