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प्रश्न
Fill in the boxe to show the corresponding energy transformation.
उत्तर
Chemical energy ⇌ Light energy
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संबंधित प्रश्न
A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?
A coolie does no work against the force of gravity while carrying a luggage on a road.
A body, when acted upon by a force of 10 kgf, moves to a distance 0.5 m in the direction of force. Find the work done by the force. Take 1 kgf = 10 N.
A boy weighing 25 kgf climbs up from the first floor at height 3 m above the ground to the third floor at height 9m above the ground. What will be the increase in his gravitational potential energy? (Take g = 10 N kg -1)
A max X goes to the top of a building by a vertical spiral staircase. Another man Y of the same mass goes to the top of the same building by a slanting ladder. Which of the two does more work against gravity and why?
Why is the work done on an object moving with uniform circular motion zero?
A uniform circular motion is an accelerated motion. Justify it.
Does the earth move around the sun with a uniform velocity?
What is the work done when the object acted upon by a force remains at rest?
Is work done a scalar or a vector physical quantity?
An object is dropped from a height H. when is its
(i) P.E. maximum,
(ii) K.E. maximum,
(iii) P.E. = K.E.?
Fill in the boxe to show the corresponding energy transformation.
Why is less effort needed to lift a load over an inclined plane as compared to lifting the load directly?
