Answer:
E.P.E = 1.27 x 10⁻⁴ J = 0.127 mJ
Explanation:
From Law of Conservation Energy, we know that:
Elastic Potential Energy Stored = Gain in Kinetic Energy + Gain in Gravitational Potential Energy
E.P.E = (1/2)mv² + mgh
where,
E.P.E = Elastic Potential Energy = ?
m = mass of flea = 0.1 g = 1 x 10⁻⁴ kg
v = speed = 1.25 m/s
g = 9.8 m/s²
h = height = 5 cm = 0.05 m
Therefore,
E.P.E = (1/2)(1 x 10⁻⁴ kg)(1.25 m/s)² + (1 x 10⁻⁴ kg)(9.8 m/s²)(0.05 m)
E.P.E = 0.78 x 10⁻⁴ J + 0.49 x 10⁻⁴ J
E.P.E = 1.27 x 10⁻⁴ J = 0.127 mJ
