# Conservation of energy lab

Topics: Potential energy, Energy, Conservation of energy Pages: 5 (538 words) Published: December 14, 2014
﻿Conservation of energy lab

April-1-14

Abstract: The purpose of this lab is to verify the law of conservation of energy. The law of conservation of energy states that in an isolated system energy cannot begained or lost, but only transformed throughout the system, assuming there are no non-conservative forces present. If conservation of energy is indeed true, it is expected that the initial energy of a system will equal the final energy of a system. Thus using a ramp and marble we are able to calculate the energy conserverved and released during this lab. With approximately .2 to .7 percent error.

Energy-is one of the basic quantitative properties describing a physical system or object's state. Energy can be transformed (converted) among a number of forms that may each manifest and be measurable in differing ways.

Gravitational potential energy- at a location is equal to the work per unit mass that is done by the force of gravity to move an object to a fixed reverence location.

Kinetic energy-of an object is the energy, which it possesses due to its motion.

Mechanical energy-s the sum of potential energy and kinetic energy. (PE+KE)

-The relationship between speed, KE, height, and PE is that the potential energy (PE) is the energy the object is experiencing at the peak of the hill or elevated height. As the object lowers in altitude the speed increases due to the PE turning into kinetic energy (KE). Once the object is at the lowest altitude the object is experiencing only KE which is equal to the PE at the top of the hill or at the highest point of elevation.

Procedure:

Tools required – a marble, a meter stick, carbon paper, and a ramp.

Steps
1. Set up the apparatus

2. Measure the height to the top of the track in reference to the tabletop (h)

3. Measure the height of the table (y)

4. Set your marble at the top of the ramp, launch it, and note its approximate landing position on the floor.

5. Place a piece of carbon paper on top of the floor were the marble had landed

6. Measure the horizontal distance from the point of launch at the end of the ramp to the landing location of the marble. (X)

*In order to gain precision repeat steps 4 and 6 approximately three-four times and average out the data *

Conclusion: the group got the conclusion that he did because we had followed the procedure correctly. The theories that were enforced in the lab were the theories of conservation of energy. Due to the fact that the energy the marble had, as it started at the top of the ramp is the same energy the marble had once it exited the marble. The only difference is the kinetic energy and the potential energy.

Tables:

Table 1

Trial
(y)
(x)
h(m)
m(kg)
1
.92m
0.56m
0.15m
.0085kg
2
.92m
0.54m
0.15m
.0085kg
3
.92m
0.55m
.15m
.0085kg
Ave
.92m
.55m
.15m
.0085kg

Table 2

Trail
Method 1 (projectile motion)

Method 2(cons. of energy)

t(s)
Vx(m/s)
KE(1) (J)

PE (J)
KE (2) (J)
Energy loss (J)
1
.43s
1.3 m/s
.0861 J

.091 J
.091 J
.0049J
2
.43s
1.26 m/s
.0861 J

.091 J
.091 J
.0049J
3
.43s
1.28m/s
.0861 J

.091 J
.091 J
.0049J
Ave
.43s
1.28m/s
.0861 J

.091 J
.091 J
.0049J