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Energy.A force of 12N acts on anobject of mass of 4kg in the state of rest for 3s. Calculate the kinetic energy acquired by the object. |
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Answer» For a block in equilibrium, Normal reaction, N=mg Equating forces along X−axis, ma=F−f where f=μmg ma=F−μmg a= m F−μmg
a= 4 12−0.2×4×10
a= 4 12−8
a= 4 4
a=1 MS −2
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