You pull your little sister across a flat snowy field on a sled. Your sister plus the sled have a mass of 25 kg. The rope is at an angle of

Question

You pull your little sister across a flat snowy field on a sled. Your sister plus the sled have a mass of 25 kg. The rope is at an angle of 38 degrees to the ground. As you pull with a force of 29 N, the sled travels a distance of 52 m with a force of 30 N how much work do you do?

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Thiên Ân 5 years 2021-08-17T14:58:05+00:00 1 Answers 333 views 1

Answers ( )

  1. kiet
    1
    2021-08-17T14:59:35+00:00
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    Answer

    Work done will be equal to 1229.296 J

    Explanation:

    We have given mass of the sister m = 25 kg

    Angle between rope and ground \Theta =38^{\circ}

    Force F = 30 N  

    So horizontal force =Fcos\Theta =30\times cos38^{\circ}=23.64N

    Distance traveled d = 52 m

    ‘We have to find the wok done

    Work done is equal to multiplication of horizontal force and distance

    So work done W=23.64\times 52=1229.296J

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