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प्रश्न
How many watts equal one horse power?
How many watt is equivalent to one horse power?
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उत्तर
The relation between two units of power is as follows -
1 hours power = 746 W
1 h.p. = 746 W
संबंधित प्रश्न
Write an expression for the work done when a force is acting on an object in the direction of its displacement.
When does a force perform work?
In which of the following cases, is work being done?
(i) A man pushing a wall.
(ii) a coolie standing with a load of 12 kgf on his head.
(iii) A boy climbing up a staircase.
MULTIPLE CHOICE TYPE
In an electric cell which in use, the change in energy is from:
State two advantage of producing hydroelectricity.
Give one example in which a force does zero work.
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?
What is meant by a translational motion? Give one example.
P, Q and R are three forces which act as shown in fig.
The point O lies in the same plane. Given, P = Q = R = 10N
(i) Which force has the least moment about O? Give a reason.
(ii)Which force has the greatest moment about O? Give a reason.
Complete the following sentences:
The SI unit of work is ....... and of power is .......
A boy pulls a box up to 10 m with a force of 5 kgf. Calculate the work done by him.
How fast should a boy weighting 30 kg run so that his kinetic energy is 375 joule?
State the energy changes which take place when A toy car with a wound spring moves on ground.
A canon ball of mass 500g is fired with a speed of 15m/s-1. Find: its momentum.
What is the difference between renewable and non-renewable resources?
The weights of two bodies are 2.0 N and 2.0 kgf respectively what is the mass of each body?
State whether work is done or not, by writing yes or no, in the following case:
A boy climbs up 20 stairs.
