Question

A boy which having mass of 50 kg
climbs a tree in 10 minutes.
if the power of the boy is 5 watt ,
what is the height of the tree ?

Answer 1

Mass = 50 kg
t = 10 minutes = 10x 60 = 600 s
P = 5 Watt
what is the height of the tree ?

solution :
g = 10 N/Kg

so, 
P = W/t
P = (F x s)/t
5  = ((50x10) x s)/600
5 x 600 = (500 x s)
3.000    = 500 x s
        s  = 3.000/500
        s  = 6 m

hight of the tree is 6 m