A box is pushed by a horizontal force of magnitude newtons at a constant speed against a frictional force of 5 newtons. The forces acting on the box are shown in the diagram below.
Given that no other forces are acting on the box, write down the value of and the value of .
You can calculate the work done by a force using the formula:
work done by a force = force × distance moved in the direction of the force.
Calculate the work done against friction on the box as it moves along the horizontal floor from point to the point which is 4 metres away. Clearly state the units with your answer.
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