A boy mass 30Kg can go up 20 steps each of height 10cm in 20sec. Calculate the power of the boy. [g=9.8m/s²]
Answers
Answered by
68
Question:-
- A boy mass 30Kg can go up 20 steps each of height 10cm in 20sec. Calculate the power of the boy. [g=9.8m/s²]
To Find:-
- Find the power of boy.
Solution:-
Given ,
- Mass of boy = 30 kg
- h is 20 × 10 = 200 cm = 2 m
- t = 20 sec
Formula to be Used:-
- Potential Energy = mgh
First ,
We have to find the Potential energy:-
Now ,
We have to find the Power of boy:-
Hence ,
- Power of boy is 29.4W
prince5132:
Nice !
Answered by
24
Answer:
- Mass of boy = 30 kg
- Height = 200 cm = 2m
- Time = 20 sec
- Power of the boy
First of all we will find the energy used:-
⇒ P.E = mgh
⇒ P.E = 30 × 9.8 × 2
⇒ P.E = 588
Now let's find the Power of the boy:-
⇒ Power =
⇒ Power =
⇒ Power = 29.4 Watt
Hence, the Power of the boy is 29.4W.
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