Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
Principle of moments: If a body is in equilibrium under the action of number of force, then the sum of clockwise moments is equal to the sum of anticlockwise moments.
APPEARS IN
संबंधित प्रश्न
A boy of weight 40 kgf climbs up the 15 steps, each 15 cm high in 10 s and a girl of weight 20 kgf does the same in 5 s. Compare:
- the work done, and
- the power developed by them. Take g = 10 N kg-1.
What are the quantities on which the amount of work done depends? How are they related to work?
What is meant by a translational motion? Give one example.
Write an expression for work done by a force depends?
Why is less effort needed to lift a load over an inclined plane as compared to lifting the load directly?
In what way does an ‘Ideal machine’ differ from a ‘Practical machine’?
State larger units of power.
An electric motor pump is 60% efficient and is rated 2.5 H.P. Calculate the maximum load it can lift through a height of 10m in 8 sec. (1 H.P. = 750 W).
