Picket fence free fall lab

Picket Fence Free Fall

We say an object is in free fall when the only force acting on it is the earth’s gravitational force.

No other forces can be acting; in particular, air resistance must be either absent or so small as to

be ignored. When the object in free fall is near the surface of the earth, the gravitational force on

it is nearly constant. As a result, an object in free fall accelerates downward at a constant rate.

This acceleration is usually represented with the symbol g.

Physics students measure the acceleration due to gravity using a wide variety of timing methods.

In this experiment, you will have the advantage of using a very precise timer connected to the

calculator and a Photogate. The Photogate has a beam of infrared light that travels from one side

to the other. It can detect whenever this beam is blocked. You will drop a piece of clear plastic

with evenly spaced black bars on it, called a Picket Fence. As the Picket Fence passes through

the Photogate, the LabPro or CBL 2 interface will measure the time from the leading edge of one

bar blocking the beam until the leading edge of the next bar blocks the beam. This timing

continues as all eight bars pass through the Photogate. From these measured times, the program

will calculate the velocities and accelerations for this motion and graphs will be plotted.



Figure 1


• Measure the acceleration of a freely falling body (g) to better than 0.5% precision using a

Picket Fence and a Photogate.


LabPro or CBL 2 interface Vernier Photogate

TI Graphing Calculator Picket Fence

DataGate program clamp or ring stand to secure Photogate

Modified from and reported with permission

of the publisher Copyright (2000),

Vernier Software & Technology

Experiment 5

5 – 2 Physics with Calculators


1. Inspect your Picket Fence. You will be dropping it through a Photogate to measure g. The

distance, measured from one edge of a black band to the same edge of the next band, is

5.0 cm. What additional information will you need to determine the average speed of the

Picket Fence as it moves through the Photogate?

2. If an object is moving with constant acceleration

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
The price is based on these factors:
Academic level
Number of pages
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more

STAY HOME, SAVE LIVES. Order your essay today and save 20% with the discount code ATOM