Formula:
Gravitational Potential Energy (GPE) = mass (m) * acceleration due to gravity (g) * height (h)
Values:
* mass (m) = 0.57 kg
* acceleration due to gravity (g) = 9.8 m/s² (approximately)
* height (h) = 0.8 m
Calculation:
GPE = 0.57 kg * 9.8 m/s² * 0.8 m
GPE ≈ 4.47 J (joules)
Therefore, the gravitational potential energy of the tennis ball is approximately 4.47 joules.