Flipping Physics
  • Home
  • Physics Videos
    • AP Physics 1 >
      • AP Physics 1 Review
      • AP Physics 1 Teachers
    • AP Physics 2
    • AP Physics C >
      • AP Physics C Review
      • AP Physics C Teachers
    • AP Physics C E&M
    • Vertical Videos
    • Playlists
  • URP
  • GIFs
    • Kinematics GIFs
    • Dynamics GIFs
    • Work Energy and Power GIFs
    • Momentum and Impulse GIFs
    • Rotational Kinematics GIFs
    • Rotational Dynamics GIFs
    • Universal Gravitation GIFs
    • Simple Harmonic Motion GIFs
    • Fluids GIFs
    • Waves GIFs
    • Sound GIFs
    • Electricity GIFs
  • About
    • Comments
    • Teacher Comments
    • Music
    • Flipping >
      • Gameful
      • Physics Labs
      • How to Flip
      • How to Learn
      • The Basics >
        • 8 Don'ts
        • 9 Dos
    • FAQ
    • Making a Video
    • EDpuzzle
    • Spreadsheets
    • Technology
    • Survivor Application
  • Give
  • Shop
  • Help Out
    • Quality Control
    • Collaborate
  • Blog

Dropping a Ball from 2.0 Meters
An Introductory Free-Fall Acceleration Problem (12:11)

Previous Video
Lecture Notes
Give
AP Physics 1
Next Video
In this introductory free-fall acceleration problem we analyze a video of a medicine ball being dropped to determine the final velocity and the time in free-fall.  Included are three common mistakes students make.  "Why include mistakes?" you might ask.  Well, it is important to understand what happens when you make mistakes so that you can recognize them in the future.  There is also brief description of "parallax" and how it affects what you see in the video compared to reality.
Picture
Content Times:
0:26 Reading and viewing the problem
0:50 Describing the parallax issue
1:52 Translating the problem to physics
2:05 1st common mistake: Velocity final is not zero
3:09 Finding the 3rd UAM variable, initial velocity
3:56 Don't we need to know the mass of the medicine ball?
4:35 Solving for the final velocity in the y direction: part (a)
5:39 Identifying our 2nd common mistake: Square root of a negative number?
7:56 Solving for the change in time: part (b)
8:28 Identifying our 3rd common mistake: Negative time?
9:36 Please don't write negative down!
10:27 Does reality match the physics?
11:07 The Review

2015.11.02: Emre Kabasakal, a student in Istanbul, Turkey, enjoyed my extemporaneous "The Physics Works" song in my video Dropping A Ball from 2.0 Meters so much he decided to make his own version of it. Thank you for making my day Emre! Please enjoy Emre's version of "The Physics Works".

                Copyright © 2013-2025 · All Rights Reserved · Flipping Physics