So, V_F= 11m/sWhat is the speed of the potted plant after falling 6m?

  • Thread starter Thread starter mcHefner
  • Start date Start date
  • Tags Tags
    Plant Speed
AI Thread Summary
The discussion centers on calculating the final speed of a potted plant after falling 6 meters from a 12-meter high ledge. Participants agree that mass is irrelevant in this scenario due to the conservation of mechanical energy. Using the equation v² = 2gh, the first participant calculates a final speed of approximately 11 m/s. Another participant arrives at a slightly lower speed of about 10.84 m/s using a different method involving initial velocity and acceleration. Both calculations confirm the principles of energy conservation in free fall.
mcHefner
Messages
1
Reaction score
0

Homework Statement


[PLAIN]http://img8.imageshack.us/img8/664/photo4dc.jpg
Sorry it is sideways.

Only known data is the 6m drop from the 12m high ledge.

Homework Equations



Currently wokring with Kinetic energy (1/2mv^2), potential energy(mgh).

The Attempt at a Solution



My thinking is mass doesn't matter, it will cancel out due to the mechanical energy( if that makes sense). Therefore the equation to solve is v2f=2gh

Therefore after subbing in 9.81m/ss for g, 6m for h; my final answer is 11m/s with rounding because of sig figs.

Thank you for help
 
Last edited by a moderator:
Physics news on Phys.org
Uh, do you think you could make that figure a little bigger ... I mean, I can almost see 25% of it at a time as it is.
 
I also got 11m/s, but found that answer in a less complicated way:

You know:
velocity_initial is 0m/s
Distance is 6m
Acceleration is 9.8m/ss

So:
velocity_final= SQRT(2*A*D)
V_F= SQRT(2*9.8*6)
V_F= 10.844m/s
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »

Similar threads

What is the Recoil Speed and Energy Stored in a Spring Gun After a Collision?
Replies
5
Views
2K

Hot Threads

Recent Insights

Back
Top