Question

BOY OF MASS 10KG CLIMB UP TEN STEPS EACH OF HEIGHT 0.2CM IN 20SECS.CALCULATE THE POWER OF THE BOY

Answer 1

Answer:

Explanation:

Mass of boy =10kg

No of steps =10

Each step height =0.2 cm

Time = 20 sec

Take g = 10 m/s2

Height of 10 steps =10×0.2 =0.002m

F=ma

F=10×10

=100N

W=f × s

W=100× 0.002

= 0.2 J

P =watt/time

=0.2÷20

=0.01 w