Question

A Studead dropped 0.25 kg box from high,

hesht of 2.3 metersit box lands on the floor.
Part A what is the potential energy of box before it fallen. part B What is Kinect energy of box before is it is dropped

Answer 1

Step-by-step explanation:

Potential energy is defined as the "stored" energy inside of the field, in our case the graviational field. Since the force of gravity is conservative, the reference point for our potential energy is arbitrary. This means that we can arbitrarily set where the potential energy is zero. The easiest case is setting the potential energy zero when the box is on the floor. The potential energy is defined as:

`U=mgh`

We are given the mass, the height from the ground, and the graviational acceleration is 9.8m/s^2. Plugging this in gives:

`U=(0.25kg)(9.8m/s^2)(2.3m)=5.64J`

Kinetic energy is defined as the energy of the configuration during motion. Before the box begins to fall, it is completely stationary. Therefore the kinetic energy is zero.