State the Second law of motion. prove the F=ma. Define S.I unit of force
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the SI unit of force is Newton
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It states that: the rate of change in momentum of a body is directly proportional to the unbalanced force acting on it and the momentum change occurs in the direction of applied force.
F is proportional to m(v-u)/t
let k as the constant of proportionality
f=km(v-u)/t
replacing (v-u) /t by a
f=kma
the value of k is one
f =ma
the SI unit of force is newton or N
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