Question

What is the work done to move a body of mass 60 kg to a distance of 5 meters, if the co-efficient if friction between body and the plane is 0.22 ?
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Answer 1

Answer:

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Answer 2

Answer:

the work done to move a body of mass 60 kg to a distance of 5 meters if the co-efficient of friction between the body and the plane is 0.22 will be $646.8 \ Nm$

Step-by-step explanation:

• We have the expression for work done as,

        $W = F\times x$     ...(1)

        Where W is the work done to move an object, F is the force applied and x is the distance moved by the object

• Force can be obtained by using the expression,

        $F = \mu mg$        ...(2)

         Where

         $\mu$  - the coefficient of friction

         m - Mass of the object

         g -  acceleration due to gravity.

• In the question, it is given that,

       $m = 60\ kg$           $\mu = 0.22$          $x = 5m$

       We know,

       $g = 9.8m/s^2$

       Substituting these values into equation (2),

      $F = 0.22\times 60\times 9.8 =129.36N$

      Then using equation(1),

      $W = 129.36\times 5 = 646.8 \ Nm$