# The Conservation of Mechanical Energy

## The Conservation of Mechanical Energy

• Submitted By: liping
• Date Submitted: 03/12/2010 9:42 PM
• Category: English
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• Page: 4
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NANYANG TECHNOLOGICAL
UNIVERSITY

[pic]

G 171: Laboratory Experiment 1A

Formal report
For
Experiment M2

Energy and Momentum Principles
By
Gan Rui Wei
Group BL 08
(020387J03)

Submit to: Foo J.J
TABLE OF CONTENT

PART 1: CONSERVATION OF ENERGY IN A GRAVITATIONAL FIELD

1. INTRODUCTION
2. OBJECTIVE
3. APPARATUS
4. EXPERIMENTAL PROCEDURE
5. EVALUATION AND RESULTS
6. DISCUSSION
7. CONCLUSION

PART 2: CONSERVATION OF LINEAR MOMENTUM

1. INTRODUCTION
2. OBJECTIVE
3. APPARATUS
4. EXPERIMENT PROCEDURE
5. CALCULATION
6. DISCUSSION
7. CONCLUSION
PART 1: CONSERVATION OF ENERGY IN A GRAVITATIONAL FIELD

1.1 INTRODUCTION

This experiment is the demonstration of conservation of mechanical energy in the swing of a pendulum in the presence of gravity.

A compound pendulum is released from a certain angle from its equilibrium and then allowed to oscillate about a knife-edged pivot in a gravitational field. During the oscillations, potential energy is converted to kinetic energy and vice versa. The potential energy is maximum at the highest point of the pendulum swing while the kinetic energy is the maximum at the equilibrium point.

It will be experimentally demonstrated that the maximum potential energy at the highest of the pendulum swing is equal to the maximum kinetic energy at the lowest of the swing.

Maximum potential energy = maximum kinetic energy (1)

I.e. all the potential energy is converted to kinetic energy.

1.2 OBJECTIVE

This experiment helped us to have a better understanding of:
a. Potential energy in a gravitational field;
b. Rotational kinetic energy of a solid body;
c. Conservation of energy in a gravitational field;
d. Moment of inertia about an axis.

1.3 APPARATUS

a. 1 pendulum, consisting of a long bar with a...