Question

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Answer 1

Answer:

Hope this ans is right!!

Explanation:

1)It is easier to push a lighter box than the heavy box at the same floor because as the frictional force increases between the floor and the box we have to greater force to push from one place to another.As the light box is easy to push because it has low frictional force between the floor and we need to put less effort ...

2) ejects large amounts of water at a high velocity. decreases. Hence, it is difficult for him to remain stable while holding the

Answer 2

Ans:-

(a). It is difficult to push an empty box than to push the box full of books because the frictional force depends on nature of surface as well as weight of object. So, we had to put less energy to push the empty box where as we had to exert a lot of force to overcome the force of friction. So, it is difficult to push a box full of books.

(b). It is difficult for a fireman to hold a hose which ejects large amount of water with high velocity because the surface area of hose is small so, the pressure of hose increases that's why it is difficult to hold a hose which ejects large amount of water with high velocity

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