Question

Use Newton's second law of motion to calculate the acceleration of a 7kg mass if a force of 68.6N acts on it?

Answer 1

`9.8 ms^(-2)`

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Seeing as the mass does not change we can use the simplified version of Newton's Second Law: `vecF=mveca`.

`F=68.6N` and `m=7.0kg`
`vecF=mveca ⇒ veca=vecF/m=68.6/7.0=9.8ms^-2`

Presumably this object is in free fall in the absence of air resistance.