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A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (see the given figure). Let us take it that the force acts on the object through the displacement. What is the work done in this case?
When do we say that work is done?
When does a force perform work?
What are the quantities on which the amount of work done depends? How are they related to work?
Is it possible that a force is acting on a body but still the work done is zero? Explain giving one example.
A weight lifted a load of 200 kgf to a height of 2.5 m in 5 s. calculate: (i) the work done, and (ii) the power developed by him. Take g= 10 N kg-1.
A body of mass 60 kg has the momentum 3000 kgm/s-1. Calculate: the speed of the body.
Define Translational motion.
A bucketful of water is to be drawn from a well ______ will be done when a ______ is applied to do this because there will be a ______ of water.
(displacement, work, force)
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A donkey is carrying a load on its back.
