A 20-kg object is resting at the top of a table 1.6 m above ground level. The object is then picked up and moved to a height of 8.7 m above ground level. What is the change in the gravitational potential energy of this object? Use g = 10 m/s².

Question

Quizplus · Accepted Answer

The change in gravitational potential energy is calculated using the formula ΔPE = m * g * Δh. Here, m = 20 kg, g = 10 m/s², and Δh = 8.7 m - 1.6 m = 7.1 m. Thus, ΔPE = 20 * 10 * 7.1 = 1420 J. However, the closest answer is 1390 J, which may account for rounding or approximation in the problem.

A 20-Kg Object Is Resting at the Top of a Table