Math, asked by LydiaM, 4 months ago

A man whose mass is 50 kg climbs up 30 steps of a staircase. If each step is 20 cm high, calculate the energy used in climbing the stairs. [Given g = 10 m/s]​

Answers

Answered by noddyansari786
17

Answer:

the SI unit of energy is joule

Step-by-step explanation:

30×20= 600

Answered by Anonymous
48

Answer :

  • The energy possessed by the man with mass of 50 kg in climbing 30 steps which are 20 cm long is 3000 J.

Explanation :

Given :

  • Mass of the man, m = 50 kg
  • No. of steps, n = 30
  • Height of each step, h = 20 cm or 0.5 m
  • Acceleration due to gravity, g = -10 m/s².

[Since the body is moving against the gravity , the accelaration due to gravity will be taken as negative]

To find :

  • Energy possessed by the man while climbing the stairs, P.E. = ?

Knowlwdge required :

Formula for Potential energy possessed by a body :

⠀⠀⠀⠀⠀⠀⠀⠀⠀P.E. = mgh

Where,

  • P.E. = Potential energy possessed by the body.
  • m = Mass of the body
  • g = Acceleration due to gravity
  • h = Height of the body

Solution :

By using the formula for potential energy and substituting the values in it, we get :

⠀⠀=> P.E. = mgh

⠀⠀=> P.E. = 50 × 10 × 30 × 0.5 [Since the man has covered 30 steps with each height 0.5 m]

⠀⠀=> P.E. = 50 × 10 × 6

⠀⠀=> P.E. = 3000

⠀⠀⠀⠀⠀⠀⠀⠀⠀∴ P.E. = 3000 J

Therefore,

  • Energy possessed by the man while climbing the stairs, P.E. = 3000 J.

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