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प्रश्न
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उत्तर
Work
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संबंधित प्रश्न
A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (see the given figure). Let us take it that the force acts on the object through the displacement. What is the work done in this case?
How much energy is gained by a box of mass 20 kg when a man, carrying the box waits for 5 minutes for a bus?
Fill in the blank with suitable word :
1 joule is the work done when a force of 1 __________ moves an object through a distance of one __________ in the direction of __________.
When is the work done by a force on a body : (a) positive, (b) negative, and (c) zero?
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?
A woman pulls a bucket of water of total mass 5 kg from a well which is 10 s. calculate the power used by her.
________ is said to be done when a force is acting on it.
A force of F = (5y + 20) `hat"j"` N acts on a particle. The work done by this force when the particle is moved from y = 0 m to y = 10 m is ______ J.
State whether work is done or not, by writing yes or no, in the following case:
A man pushes a wall.
