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संबंधित प्रश्न
Define work.
State two conditions when no work is done by a force.
A coolie is moving on a road with a luggage on his head. Does he perform work against the force of gravity? Give reason for your answer.
Write the expression for work done by a force.
Define the term 'work'. Write the formula for the work done on a body when a force acts on the body in the direction of its displacement. Give the meaning of each symbol which occurs in the formula.
A person of mass 50 kg climbs a tower of height 72 metres. Calculate the work done. (g = 9.8 m s−2).
What is meant by a translational motion? Give one example.
Why does a spanner have a long handle?
A boy does work when he pushes against a brick wall. (yes/no).
Give two examples of work done.
Write an expression for work done by a force depends?
Fill in the boxe to show the corresponding energy transformation.
What do you understand by the term energy? Is energy a scalar or vector? How is the energy possessed by a body measured?
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
Suma is swimming in a pond.
A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table?
