The villain (pick your favorite) has just dropped an innocent bystander from this very tall building in order to distract the hero (pick your favorite) and make a getaway. The building is high enough for a person to reach terminal velocity.
With just one story to go our hero swoops in and catches the bystander and sets (him or her) down onto the sidewalk perfectly at rest.
How much force would it take to bring the bystander to a rest over that distance, and would the bystander be able to survive that?
Make sure to label everything that seems important. Make one informal picture and then off to the side draw a free body diagram of the bystander that represents the forces present while the hero is bringing him or her to a stop.
Below is a list of information that you will need to look up or make an assumption about in order to solve the problem. Reference all information you look up, justify all information that you are making assumption about.
Bystander Mass (kg):
Height of one story (m):
Person’s Terminal Velocity (m/s):
Your unknown is (unit?):
List out the equations that you think will help you solve this problem. Your equations will introduce some new unknowns that should cancel out when you are working through step 4.
Rearrange the equations you listed in step 3 to come up with one equation that will give you the answer that you are looking for, and then plug in the known quantities and find your unknown.
Does this seem reasonable? What are you basing this on. Is it survivable?
Section | Poor | Fair | Excellent |
DAP ___5pts | Picture depicts only some of the aspects of the problem. | Picture depicts most aspects of the problem | Picture clearly depicts all aspects of the problem |
KNU ___5pts | List contains some information. | List contains most information. | List contains all information. |
EQN ___5pts | Some of the equations are listed. | Most equations are listed. | All equations that could be needed are listed. |
SSF ___5pts | Student made major errors in solving for the unknown. | The student made minor mistakes or didn’t solve all symbolically first. | The student correctly solved for the unknown. |
CYA ___5pts | Reasoning does not fit or is absent. | Student is a little bit unclear on reasoning. | Student gave sound reasoning for their perceived correctness |
PHYSICS by MN Partnership for Collaborative Curriculum is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.