Question

100 POINTS!! PLEASE HELP!!

A student is developing a model to show the mechanical energy of a falling brick. The brick is initially at rest at a height h0 above the ground. The model identifies the percentage of gravitational potential energy(PE) and kinetic energy (KE) of the brick as it falls. note that the model assumes that air resistance is negligible, so the mechanical energy of the brick is conserved.
which statement about arrow number two is most useful for explaining the model?

Answer 1

Answer:

The arrow describes the brick at height ½h₀.

Explanation:

Total energy is conserved, so as an object falls, its potential energy is converted to kinetic energy. Gravitational potential energy is equal to the weight of the object times the height, so when the object is at half the initial height, the potential energy is half the initial potential energy. Therefore, the second arrow shows when the brick is at half the initial height.