Answer:
Power = 180 Watt.
Explanation:
W = Work done = m x g x H.
m = mass of the body.
g = acceleration due to gravity = 9.8 m/s^2.
W = weight of the body = m x g = 720 N.
H = height of the body = 5 m.
t = Time = 20 s.
Plugging the above values in the formula we get:
W = 720 x 5 = 3600 J.
Power = [tex]\frac{W}{t}[/tex]
= [tex]\frac{3600}{20}[/tex] = 180 Watt.
Therefore the required value of power = 180 Watt.
