Advertisements
Advertisements
प्रश्न
Why is less effort needed to lift a load over an inclined plane as compared to lifting the load directly?
Advertisements
उत्तर
Less effort is required because for a given height ‘h’ as longer is the length ‘l’ of the inclined plane, smaller is the angle of inclination, therefore, greater is the mechanical advantage, so lesser will be the effort required. As we know
Mechanical Advantage = l/h.
संबंधित प्रश्न
In which of the following cases is work being done:
- A boy pushing a heavy rock
- A boy climbing up the stairs
- A coolie standing with a box on his head
- A girl moving on the road.
State the S.I. unit of energy.
Give one example in which a force does zero work.
When do we say that work is done? Write the formula for the work done by a body in moving up against gravity. Give the meaning of each symbol which occurs in it.
Give two examples of couple actions in our daily life.
Can every force produce work?
Complete the following sentences:
1 H.P. = ........ W.
A body does 20 J of work in 10 s. What is its power?
A force can cause an object to change its ______.
