Question

A body of mass 50 kg runs up a staircase of 40
steps. Each step of height 15 cm Find the work done?​

Answer 1

Explanation:

Hugo oh OK I will send you later my mom is calling me a pic of you and I don't know about that I have to go to the washing

Answer 2

Given :-

Mass of the bag = 10 kg

Number of steps = 18 steps

Height of each step = 20 cm

To Find :-

The work done by the girl.

Analysis :-

Here we are given with the mass, number of steps and height of each step.

Firstly, find the total height of the staircase by multiplying the number of steps and the height of each step.

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 :-

Total height,

Total height of the staircase = No. of steps × Height of each step

Substituting their values,

⇒ 18 × 20

⇒ 360 cm

Using the formula,

\underline{\boxed{\sf Work \ done=Mass \times Gravity \times Height}}

Work done=Mass×Gravity×Height

We know that,

m = Mass

w = Work done

g = Gravity

h = Height

Given that,

Mass (m) = 10 kg

Gravity (g) = 10 m/s

Height (h) = 360 cm = 3.6 m

Substituting their values,

⇒ w = mgh

⇒ w = 10 × 10 × 3.6

⇒ w = 100 × 3.6

⇒ w = 360 J

Therefore, the work done by the girl is 360 J.