HOTS - Problem on work done — task. Physics CBSE Live product, Class 9.

1. Work is done only when:

applied force is strong
applied force generates motion
applied force is normal to the displacement
force is applied

2. In order to do work:

force must act at any angle to the displacement
force may not act along the same direction as is the displacement
must act along the direction of displacements
must act normal to the direction of displacement

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