A 9 kg model airplane lies horizontally at a constant speed. If the plane suddenly dives from its altitude of 50 m and levels off at 20 m, how much potential energy does it lose in the dive?
A)450 J
B)1800 J
C)2700 J
D)9000 J

Question

Quizplus · Accepted Answer

The potential energy lost is equal to the change in potential energy, which is given by the formula:PE = mghwhere:m is the mass of the object (9 kg)g is the acceleration due to gravity (9.8 m/s^2)h is the change in height (50 m - 20 m = 30 m)Plugging in the values, we get:PE = (9 kg)(9.8 m/s^2)(30 m) = 2700 JTherefore, the correct answer is C) 2700 J.

A 9 Kg Model Airplane Lies Horizontally at a Constant