Topics:Acceleration, Mass, KinematicsPages: 39 (1224 words)Published: September 19, 2013
This experiment was conducted in order to determine the density of the Aluminum metal samples provided in the lab. Specific tools such as the vernier caliper and balance scale were used to measure and record the values found. Given that density is a measurement of mass over volume, both of these quantities would have to be determined experimentally, prior to proceeding with the calculation of the density, for each of the six subjects tested. Being as accurate and precise as possible, the data yielded a density that was similar to that of the accepted value for the density of aluminum. Taking averages of the measurements recorded by both partners may have introduced a variable for error. However, upon calculating the percent error of the results found, it was concluded that there was less than a three percent error, which supported the accuracy and credibility of the experiment.
Table 1: Tabular Presentation
Diameter D1 (cm)
Average Height (cm)
Experiment 7: Relative Density
Marella Dela Cruz, Janrho Dellosa, Arran Enriquez,
Alyssa Estrella, Zacharie Fuentes
Department of Math and Physics
College of Science, University of Santo Tomas
España, Manila Philippines
The experiment was conducted to show the different methods on how to determine an object’s composition through its density and to determine an object’s density by displacement method and the Archimedes Principle. Results show that. The materials used were the spring scale, beaker, 25 pieces of new 25 centavo coins, a bone from a pig’s leg, diet and regular soft drinks, and a pycnometer.
Density is a physical property of matter. It is the mass per unit volume of a substance. In this experiment, relative density is also used to be able to determine the composition of the substances or objects used. Relative density is the ratio of a density of a substance to that of the density of a given reference material. It is also known as specific gravity. Density is used when making or building objects that are required to float such as ships on water and airplanes in the sky.
1. To determine the density of an object by displacement method
2. To determine the composition of a substance based on its density
3. To determine the density of a substance by Archimedes Principle
Relative Density (R.D.) or also known as Specific gravity (S.G.), is the raito of the density of...
“The Domino Effect”
Investigate the domino effect with a set of dominoes.
To investigate the relationship between the mass of the dominoes, and how it impacts the time taken of the domino effect.
Independent Variable: The mass of each domino (12.38 g, 32.38 g, 42.38 g, 62.38 g, 82.38 g).
Dependent Variable: Time taken of the domino effect.
Controlled Variable: The number of dominoes used (8 dominoes), the distance between the dominoes (2 cm), the loads used as the initial force applied on the domino (50g), the inclined plane used as a platform that will direct the load to hit the first domino (20o), the stopwatch used to time the domino effect, the person using the stopwatch, the person releasing the metal weight from the top of the inclined plane, the ruler used to measure the distance between the dominoes.
1 Inclined Plane
1 (50 g) Metal Weight
4 x 8 (20 g) Metal Weight
8 Dominoes (Uno Stackos)
1 Digital Mass Balance (± 0.01 g)
1 Masking Tape
1 Stopwatch (± 0.01 s)
Analysis of Variables
The mass of the dominoes will vary ranging from 12.38 g to 82.38 g. The increase between each of the variable will be constantly 20 g, to satisfy the range of the mass; the original mass of the domino is 12.38 g, and an additional mass from a 20 g of load will be attached on top of the domino for every change in variable.
In accordance to...
Physics 131 Lab, QL
Sept. 21, 2014
This experiment measures the study of motion by observing the force of gravity acting solely upon an object, and also measures reaction time. If an object is in free fall, the only force acting upon it is gravity. The object used in this experiment was a golf ball that provided some acceleration when dropped. A sensor positioned underneath a table recorded the golf ball’s pattern of motion, when dropped. The main objective of performing this experiment is to measure the velocity and position of the ball to eventually find the acceleration of free fall. A computer program called, DataStudio, was used to create a graph of position vs. time and a graph of velocity vs. time. The second part of the experiment involved randomly dropping a ruler and having your partner catch it to determine reaction time.
1. The parabolic curves open upward instead of downward because of the golf balls movement over time: where it is dropped from, to where it ends up. The ball begins close to the sensor, then drops to the ground, then bounces back up closer to sensor again, therefore the bounces correspond with the bottom curves of the parabola. If the data were collected from the floor then the curve would open downward. But because the sensor graphs the position from the sensor, the curve was upwards.
The slope of the velocity versus time graph...
...either not imprint anything on to the
ticker tape paper if the needle was too high or come off during the experiment as it turns. This resulted in trails having to be repeated and the waste of lab materials to retrieve accurate data.
4. The time we release and pull the tape and the operation of the stop-watch were done by two
hands. This created the possibility for the tape to be released slightly before or after the timer was activated.
5. The ideal time is 3 seconds. However, it is next to impossible to be that exact. Such a
synchronization problem can change the records of the number of dots but may not seem drastic since we are focused on the frequency and the period of the ticker timer.
percentage error= /experiment value - accepted value/ x 100
percentage error in frequency=(59.0 - 60.0)/60.0 x 100 =1.6667% =1.67%
percentage error in period =(0.0170-0.0167)/0.0167 x100 =1.7964% =1.80%
This lab shows how we can further get to know a ticker timer by applying the knowledge of frequency and period. Through the lab, I knew that frequency is the number of occurrences of a repeating event per unit time and the period in seconds, meaning the number of seconds per cycle. The lab worked out well in our group with a percentage of error of less than 2% but I still found some possible improvements that...
DYNAMIC – NEWTON’S SECOND LAW
NUR SYUHAIDAH BT ZAIDI
16th APRIL 2013
- WAN NUR'ATIQAH HANIS BT WAN SOLAH
- FATHIAH HANIM BT SHAKIRIN
- AZWINA BT JUAZER RIZAL
- FARAH ADIBAH BT MOHD JOHARI
-SITI THAHIRAH BT ABUL KALAM
Objective : a) To determine the relationship between velocity and time
b) To determine the acceleration of the motion of the trolley
c) To find the constant force exerted on the trolley
Newton's second law of motion pertains to the behavior of objects for which all
existing forces are not balanced. The second law states that the acceleration of an object is
dependent upon two variables - the net force acting upon the object and the mass of the
object. The acceleration of an object depends directly upon the net force acting upon the
object, and inversely upon the mass of the object. As the force acting upon an object is
increased, the acceleration of the object is increased. As the mass of an object is increased,
the acceleration of the object is decreased. Force is equal to mass times acceleration (for
constant mass). So ,An object will accelerate in the direction of any net force applied to it.
The greater the force, the greater the acceleration. The greater the mass, the slower the
acceleration. This means that the rate an object is slowing down or speeding up (acceleration)
depends on how...
...The Relationship Involving Acceleration, Net Force, and Mass
The purpose of this lab investigation is to observe the relationship among the net force, mass, and acceleration of an object.
If the net force increases with a constant mass,
then the acceleration would increase,
because the force would push the object to increase the velocity.
If the mass of the cart increases with a constant net force,
then the acceleration would increase
because the greater inertia of the object would cause the acceleration to decrease.
ticker timer, ticker tape, cart, masking tape, one 2-m board, marker, ruler, spring scale, three 100-g masses, two 1.0-kg masses, string,
Part A: Acceleration and Net Force
1. Verify that the equipment you intend to use is functioning properly.
2. Measure the mass of the cart and record it in the observation table.
3. Set up the apparatus so that the least net force will act on the cart. Allow the motion to occur and obtain the data required to find the acceleration α1.
4. Repeat the procedure with an increased net force. For example, you can transfer one of the 100-g masses from the cart to the string hanging over the pulley. This allows the mass of the system to remain constant. Determine the data for α2.
5. Repeat the procedure with the highest net force to determine the data for α3.
Part B: Acceleration and Mass
...Lab #1: Projectile Motion
Purpose: To determine experimentally the initial and final velocities of an air powered projectile.
Hypothesis: If the angle of the rocket is launched at 45 degrees than the distance and velocity will maximize.
Rocket launching platform
40, 45, 50, 55 and 60 angle wooden blocks
1. The rocket was assembled by the rocket launcher and screwed to the launching platform using two screws/washer/wing-nut set.
2. The launching platform was affixed to the ground by two nails pushed into the grass.
3. The supplied wooden block was used to set the angle of the launched platform.
4. The air hose was secured from the air pump to the rocket launcher.
5. The appropriate thrust washer was pushed onto the rocket launcher until it made a snap sound.
6. The rocket body was pushed down onto the rocket launcher. The top of the thrust waster was seated completely into the hole at the top of the rocket.
7. The nose cone was attached to the rocket body.
8. When instructed by the teacher, the air pump was pumped until the rocket launched.
9. The angle of the launch, the total time that the rocket was in the air and the distance it traveled was recorded.
10. The steps were repeated using all 5 available angled wooden blocks.
Table 1: Rocket Observations