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प्रश्न
________ is said to be done when a force is acting on it.
विकल्प
Ramp
Simple machines
Work
Energy
Pulley
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उत्तर
Work is said to be done when a force is acting on it.
APPEARS IN
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.
An object thrown at a certain angle to the ground moves in a curved path and falls back to the ground. The initial and the final points of the path of the object lie on the same horizontal line. What is the work done by the force of gravity on the object?
Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?
Fill in the blank with suitable word :
Work is measured as a product of __________ and __________
Each of the following statement describes a force acting. Which force is causing work to be done?
An object is dropped from a height H. when is its
(i) P.E. maximum,
(ii) K.E. maximum,
(iii) P.E. = K.E.?
Give an example
Electrical energy changes to heat energy.
A body of mass 60 kg has the momentum 3000 kgm/s-1. Calculate: the speed of the body.
