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प्रश्न
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उत्तर
1 H.P. = 0.746 kW
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संबंधित प्रश्न
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 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.
Determine the amount of work done when an object is displaced at an angle of 30° with respect to the direction of the applied force.
What is the SI unit of work?
State the energy changes which take place when A piece of magnesium wire is burnt in a jar of oxygen.
State the energy changes which take place when A toy car with a wound spring moves on ground.
Give an example
Electrical energy changes to heat energy.
An electric motor of power 100 W is used to drive the stirrer in a water bath. If 50% of the energy supplied to the motor is spent in stirring the water. Calculate the work done on the water in one minute.
