Answer:
Speed of child = 8.94 m/s
Explanation:
Given:
Mass of child = 25 kg
Height = 4 meter
Find:
Speed of child
Computation:
P.E = mgh
P.E = (25)(10)(4)
P.E = 1000 J
K.E = P.E
So,
(1/2)(m)(v)² = 1000
(1/2)(25)(v)² = 1000
(v)² = 80
v = 8.94 m/s
Speed of child = 8.94 m/s
