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Work and Mechanical Energy

AP Physics 1· difficulty 2/5

A 1.0 kg1.0~\text{kg} object at rest is pushed by a constant net force of 8.0 N8.0~\text{N} for 2.0 m2.0~\text{m}. What is its final kinetic energy?

  • A

    16 J16~\text{J}

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  • B

    4 J4~\text{J}

  • C

    8 J8~\text{J}

  • D

    12 J12~\text{J}

Explanation

By the work-energy theorem, ΔK=Wnet=Fd=(8.0)(2.0)=16 J\Delta K = W_{\text{net}} = F d = (8.0)(2.0) = 16~\text{J}.

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