A boy weighing 35 kg carries a bag of 15 kg climbs stairs in 5 s. If there are 12 steps in the stairs, each of 15 cm height. Calculate the power of the boy. [Take g = 10 m/s2]
Answers
Total Mass=35+15=50kg. Height at 12 steps=12×15/100=1.8m. Change in potential energy=mgh mgh=50×10×1.8=900 So, Work done by the man is W=900 J. Power used , P= W/T =900/5=180W
Answer:
P=61 W
Explanation:
A boy whose mass is 35 kg carries a bag of 15 kg climbs up 12 steps of a stair in 5s.
Each step is 15 cm high.
•°•Mass, m =35+15 =50kg
•°•g =10 m/s^2
Height at 12 steps, h =12×15/100
=1.8m
•°•Change in potential energy = mgh
= 50×10×1.8
= 305J
So, work done by the boy, W = 305J
Power used, P =W/t
=305/5
=61W
•°•Ans:- The power of the boy is 61 watt.
Please Mark Me The Brainliest.
