Physics
A body of mass 5 kg accelerates from 12 m/s to 20 m/s in 4 seconds due to the application of a force on it. Calculate the magnitude of this force (in N).

20
10
80
40

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Physics
The law of conservation of energy states that

Energy can either be created nor destroyed
Energy can neither be created or destroyed
Energy can either be created or destroyed
Energy can neither be created nor destroyed

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