Question

Calculate the amount of work required to be done in raising a body of mass 10kg to a height 5m
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Answer 1

Answer:

Explanation:

Potential Energy = mgh

                           

m = 10kg

h = 5m

g = 9.8 (Acceleration due to gravity)

P.E = 10 × 9.8 × 5

P.E = 490 Nm

work done = change in potential energy = 490 Nm

Answer 2

Given :-

Mass of the body = 10 kg

Height the body is carried upwards = 5 m

To Find :-

The work done in lifting the body.

Analysis :-

Here we are given with the mass and height of the body.

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

Solution :-

We know that,

• m = Mass
• h = Height
• g = Gravity
• w = Work done

Using the formula,

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

Given that,

Mass (m) = 10 kg

Gravity (g) = 10 m/s

Height (h) = 5 m

Substituting their values,

⇒ w = mgh

⇒ w = 10 × 10 × 5

⇒ w = 100 × 5

⇒ w = 500 J

Therefore, the work done in lifting the body is 500 J.