school
Acemy

Conservation of Energy

AP Physics 1· difficulty 2/5

A 4 kg4~\text{kg} box slides 5 m5~\text{m} across a floor with μk=0.30\mu_k = 0.30. Using g≈10 m/s2g \approx 10~\text{m/s}^2, the thermal energy generated is

  • A

    6 J6~\text{J}

  • B

    120 J120~\text{J}

  • C

    12 J12~\text{J}

  • D

    60 J60~\text{J}

    check_circle

Explanation

ΔEth=μkmgd=(0.30)(4)(10)(5)=60 J\Delta E_\text{th} = \mu_k m g d = (0.30)(4)(10)(5) = 60~\text{J}.

Want 10 more like this — adaptive to your weak spots?

Practice 10 like thisarrow_forwardPredict my AP score

Related questions

auto_awesomeAll Toolsquestion_answerHomework Q&Amenu_bookAP & SAT PreptimelineLearn Mode