If raindrops fell with no air drag how long would it take?

  • Thread starter Thread starter iluvpandas
  • Start date Start date
  • Tags Tags
    Air Air drag Drag
Click For Summary

Homework Help Overview

The problem involves calculating the time it would take for raindrops to fall from a height of 1.6 kilometers to the ground, assuming no air drag. The subject area pertains to kinematics and gravitational motion.

Discussion Character

  • Exploratory, Mathematical reasoning, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the use of kinematic equations to determine the fall time, with some attempting to apply the equation for distance under constant acceleration due to gravity. Questions arise regarding the correctness of their calculations and assumptions.

Discussion Status

Some participants express confusion regarding the accuracy of their answers after receiving feedback from a web assignment. There is an acknowledgment of potential errors in calculations, particularly in the application of square roots. Multiple interpretations of the problem and calculations are being explored.

Contextual Notes

Participants note discrepancies between their calculated results and the feedback received from the assignment, indicating a need for clarification on their approach and assumptions regarding gravitational acceleration.

iluvpandas
Messages
7
Reaction score
0

Homework Statement



If there were no air drag, how fast would drops fall from a cloud 1.6 kilometer above the Earth's surface?

Homework Equations


am i heading in the right direction if not what am i doing wrong?


The Attempt at a Solution



i tried converting to m first then i divided both by 2 getting

2d=at^2 and then i divided both by the acceleration which i assumed to be gravity (9.8) after that i had 2(1600)/9.8=t^2 and to get rid of the exponet i rooted both sides and got 326.5
 
Physics news on Phys.org
Yes,

d = 0.5gt^2 + v_0*t
v_0 = 0
1.6km = 0.5*9.81*t^2
t = 326..
 
when i ented the answer the web assignment said it was wrong though and now I am kind of confused as to what i did wrong.
 
iluvpandas said:
when i ented the answer the web assignment said it was wrong though and now I am kind of confused as to what i did wrong.

Because it is sqrt(326). I just recognized that. I also forgot to take square root
 

Similar threads

Replies
2
Views
2K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 27 ·
Replies
27
Views
4K
  • · Replies 8 ·
Replies
8
Views
3K
Replies
2
Views
5K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 3 ·
Replies
3
Views
4K
Replies
6
Views
2K
  • · Replies 4 ·
Replies
4
Views
4K
Replies
18
Views
4K