2. A woman pulls a 20 kg suitcase along a 15 m corridor using a horizontal force of 50 N.

2.1 Calculate the work done by the woman. Give the correct unit.
Work done =........Unit =........

2.2 Work has to be done against frictional forces acting on the wheels of the suitcase.
Explain the effect this has on the temperature of the suitcase.
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