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Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A sailboat is moving due to wind energy.
What are the units of (a) work, and (b) energy?
Explain by an example that a body may possess energy even when it is not in motion.
The work done on an object does not depend on the :
Explain the difference between a uniform linear motion and a uniform circular motion.
A body does 20 J of work in 10 s. What is its power?
A boy pulls a box up to 10 m with a force of 5 kgf. Calculate the work done by him.
A block of mass 20 kg is pulled up a slope (fig.12) with a constant speed by applying a force of 500 N parallel to the slope. A and B are initial and final positions of the block.
(a) Calculate the work done by the force in moving the block from A and B.
(b) Calculate the potential energy gained by the block.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
An engine is pulling a train.
