An advanced free-fall acceleration problem involving 2 parts and 2 objects. Problem: You are wearing your rocket pack (total mass = 75 kg) that accelerates you upward at a constant 10.5 m/s^2. While preparing to take pictures of the beautiful view, you drop your camera 5.0 seconds after liftoff. 5.0 seconds after you drop the camera, (a) what is the camera's velocity and (b) how far are you from the camera?
0:17 Reading the problem
1:26 Understanding the problem using a picture
2:10 Listing every known variable
3:22 Which part do we start solving first?
3:47 What do we solve for in part 1?
4:46 That's a lot of subscripts, why?
5:24 Starting to solve the problem. Finding the final velocity for part 1.
6:32 Solving for the final velocity for part 2 for the camera
7:46 Why is the final velocity for part 2 for the camera positive?
9:10 Finding the displacement for part 2 for the camera
9:55 Finding the displacement for part 2 for you
10:42 Finding the distance between you and the camera at the very end
11:27 The Review
The pages of APlusPhysics.com, Physics in Action podcasts, and other online media at this site are made available as a service to physics students, instructors, and others. Their use is encouraged and is free of charge. Teachers who wish to use materials either in a classroom demonstration format or as part of an interactive activity/lesson are granted permission (and encouraged) to do so. Linking to information on this site is allowed and encouraged, but content from APlusPhysics may not be made available elsewhere on the Internet without the author's written permission.
APlusPhysics.com, Silly Beagle Productions and Physics In Action materials are copyright protected and the author restricts their use to online usage through a live internet connection. Any downloading of files to other storage devices (hard drives, web servers, school servers, CDs, etc.) with the exception of Physics In Action podcast episodes is prohibited. The use of images, text and animations in other projects (including non-profit endeavors) is also prohibited. Requests for permission to use such material on other projects may be submitted in writing to firstname.lastname@example.org. Licensing of the content of APlusPhysics.com for other uses may be considered in the future.