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प्रश्न
How much work is done when a body of mass m is raised to a height h above the ground?
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उत्तर
We can calculate the work done against gravity in moving a body of mass (m) by a height (h) as, Work done in lifting a body = (Weight of body) (Vertical distance)
So, W = (m) (g) (h)
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संबंधित प्रश्न
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.
State the S.I. unit of work and define it.
State the S.I. unit of energy.
A bullet of mass 0.5 kg slows down from a speed of 5 m s-1 to that of 3 m s-1. Calculate the change in kinetic energy of the ball.
Fill in the blank with suitable word :
Work is measured as a product of __________ and __________
Give an example
Chemical energy changes to heat energy.
A force can cause an object to change its ______.
