Respuesta :

carlosego
By definition, the potential energy is
 U = m * g * h
 Where
 m = mass
 g = accelecarion of gravity
 h = height
 Substituting
 U = (7.9) * (9.8) * (20) = 1548.4J
 The block has a potential energy of 1548.4J
 Note: assuming reference level on the ground
W0lf93
The formula for potential energy is mass * gravity * height. With height given as 20m and weight given as 7.9kg, we can fill in 7.9 * gravity * 20. Gravity is 9.8m/s constant so 7.9 * 9.8 * 20 = potential energy. The result is 1549.45, with the unit of energy being joules. Final answer 1549.45 J

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