Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
If 1 joule of work is done in 1 second, the power is said to be 1 watt.
1 H.P. = 746 watt
APPEARS IN
संबंधित प्रश्न
When is work said to be done by a force?
The velocity of a car increases from 54 km/hr to 72 km/hr. How much is the work done if the mass of the car is 1500 kg?
Choose one or more correct alternatives.
For work to be performed, energy must be ______.
- transferred from one place to another
- concentrated
- transformed from one type to another
- destroyed
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.
Is the motion of moon around the earth in circular path an accelerated motion?
Write an expression for work done by a force depends?
What do you understand by 'potential energy' and 'Kinetic energy'? Give three examples of each to illustrate your answer.
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.
Who is the odd one out?
A proton is kept at rest. A positively charged particle is released from rest at a distance d in its field. Consider two experiments; one in which the charged particle is also a proton and in another, a positron. In the same time t, the work done on the two moving charged particles is ______.
