The gravitational potential energy of a 35.0-kg rock is 690.0 J relative to the ground.The rock is at a height ______ above the ground.

Question

Quizplus · Accepted Answer

The formula for gravitational potential energy is U = mgh, where m is the mass of the object, g is the acceleration due to gravity (9.8 m/s^2), h is the height above the reference level. 
Rearranging the formula to solve for height, we get h = U/mg.
Substituting the given values, h = (690.0 J) / (35.0 kg x 9.8 m/s^2) = 2.01 m (rounded to two decimal places). 
Therefore, the rock is at a height of 2.01 m above the ground. 
The best choice is C.

The Gravitational Potential Energy of a 35