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प्रश्न
What is the work done by the moon when it revolves around the earth?
उत्तर
Work done = Force × Displacement
संबंधित प्रश्न
State two conditions when no work is done by a force.
Define the term energy.
How is work related to energy?
A boy of mass 40 kg climbs up the stairs and reaches the roof at a height 8 m in 5 s. Calculate:
- the force of gravity acting on the boy,
- the work done by him against the force of gravity,
- the power spent by boy. (Take g = 10 m s-2)
State two advantage of producing hydroelectricity.
State the SI unit of work.
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 __________.
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State the conditions of equilibrium for a rigid body.
Explain the difference between a uniform linear motion and a uniform circular motion.
Is work done a scalar or a vector physical quantity?
Complete the following sentences:
Kilowatt is the unit of ....... and kWh is the unit of
A body does 20 J of work in 10 s. What is its power?
What are the advantages and disadvantages of using solar cells for producing electricity?
A force can cause an object to change its ______.
A man squatting on the ground gets straight up and stand. The force of reaction of ground on the man during the process is ______.
