Question

River water with a mass of 100 tonnes is moving at 12.5 km/hr. What is its kinetic energy?

a. 125,000 J
b. 156,250 J
c. 200,000 J
d. 250,000 J

Answer 1

The kinetic energy of the river water is approximately 1,521,604 J.

Step-by-step explanation:

The kinetic energy of an object is given by the formula KE = 0.5 * mass * velocity^2. In this case, the mass of the river water is 100 tonnes, which is equal to 100,000 kg. The velocity of the water is 12.5 km/hr, which is equal to 3.4722 m/s.

Plugging these values into the formula, we get KE = 0.5 * 100,000 * (3.4722)^2 = 1,521,604.17 J. Therefore, the kinetic energy of the river water is approximately 1,521,604 J.