The mass of 1 cubic meter of fresh water is 1,000 kg.At the top of a 100 m hydroelectric dam the potential energy of the cubic meter of water is
A)10,000 N.
B)98,000 N.
C)100,000 N.
D)980,000 N.

Question

Quizplus · Accepted Answer

The potential energy of an object is given by the formula:
Potential energy = mass x gravity x height
Here, the mass of 1 cubic meter of water is 1000 kg, the height of the dam is 100 m, and the acceleration due to gravity is 9.8 m/s^2.
Therefore, potential energy = 1000 x 9.8 x 100 = 980,000 N. 
Hence, the correct option is D.

The Mass of 1 Cubic Meter of Fresh Water Is