Question

why does the poet ask the children to run and enjoy themselves? class 4 chapter run​

Answer 1

Answer:

Given :-

Mass of the block = 10 kg

Length on frictionless inclined plane = 5 m

Height from the bottom = 3 m

To Find :-

The work done in pushing a block.

Analysis :-

Here we are given with the mass and the height.

In order to find the work done substitute the given values from the questions accordingly such that work done is equal to mass into gravity into height.

Solution :-

We know that,

m = Mass

w = Work done

g = Gravity

h = Height

Using the formula,

\underline{\boxed{\sf Potential \ energy=Mass \times Gravity \times Height}}

Potential energy=Mass×Gravity×Height

Given that,

Mass (m) = 10 kg

Gravity (g) = 9.8 m/s

Height (h) = 3 m (no work done against friction)

Substituting their values,

⇒ w = mgh

⇒ w = 10 × 9.8 × 3

⇒ w = 98 × 3

⇒ w = 294 J

Therefore, the work done in pushing a block is (B) 294 J.

Answer 2

Answer:

I don't know the answer.....

Explanation:

because I have not read the chapter......

can you please write a summary on it and upload....

hope you understand