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प्रश्न
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संबंधित प्रश्न
.A man raises a box of mass 50kg to a height of 2m in 20s, while another man raises the same box to the same height in 50s. Compare:
(i) the work done, and
(ii) the power developed by them.
Is work a scalar or a vector quantity?
If the work done by a force in moving an object through a distance of 20 cm is 24.2 J, what is the magnitude of the force?
Is the motion of moon around the earth in circular path an accelerated motion?
A girl of mass 50 kg runs up a flight of 40 steps in 20 seconds. If each step in 20 cm high, calculate the power developed by the girl. (g= 10 ms-2).
Fill in the boxe to show the corresponding energy transformation.
What are the advantages and disadvantages of using solar cells for producing electricity?
The weights of two bodies are 2.0 N and 2.0 kgf respectively what is the mass of each body?
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.
