Train deceleration traveling up hill

AI Thread Summary
The discussion focuses on correcting errors in calculations related to train deceleration while traveling uphill. Participants identify issues with the resultant net force and the equation used for calculating distance. A link to HyperPhysics is provided for reference on motion concepts. After revising the calculations, the original poster confirms they arrived at the correct answer. The importance of thoroughness in mathematical calculations is emphasized.
danjsmith98
Messages
11
Reaction score
2
Homework Statement
Hi I've been trying this question but keep getting the wrong answer any help would be appreciated 🙂
Relevant Equations
F=ma
IMG_20210516_141914859.jpg
Screenshot_20210516-141900-650.png
 
Physics news on Phys.org
Would you mind writing down the units (all of them) and see whether they check OK?
 
Reply
  • Like
Likes FactChecker
Lnewqban said:
I can see two errors:
* Revise your math regarding resultant net force.
* Incorrect equation for calculating distance.

Please, see:
http://hyperphysics.phy-astr.gsu.edu/hbase/mot.html#motcon
Thanks for that mate just redid it and got the right answer will definitely be more thorough with my calculations next time!😂
 

Thread 'Finding the number of ways to arrange identical balls in a circle'

I tried to combine those 2 formulas but it didn't work. I tried using another case where there are 2 red balls and 2 blue balls only so when combining the formula I got ##\frac{(4-1)!}{2!2!}=\frac{3}{2}## which does not make sense. Is there any formula to calculate cyclic permutation of identical objects or I have to do it by listing all the possibilities? Thanks
View full post »

Thread 'Making the denominator of a certain fraction real'

Essentially I just have this problem that I'm stuck on, on a sheet about complex numbers: Show that, for ##|r|<1,## $$1+r\cos(x)+r^2\cos(2x)+r^3\cos(3x)...=\frac{1-r\cos(x)}{1-2r\cos(x)+r^2}$$ My first thought was to express it as a geometric series, where the real part of the sum of the series would be the series you see above: $$1+re^{ix}+r^2e^{2ix}+r^3e^{3ix}...$$ The sum of this series is just: $$\frac{(re^{ix})^n-1}{re^{ix} - 1}$$ I'm having some trouble trying to figure out what to...
View full post »

Similar threads

Calculating Train Deceleration: Kid's Free Fall Time
Replies
5
Views
1K
Average Speed Question for a Train that Accelerates and then Decelerates
Replies
20
Views
2K
S=u*t+a*t^2/2 VS ratio 1:2:3:5... t1/t10= ...
Replies
8
Views
2K
What velocity does a train need to go up and down the hill
Replies
37
Views
4K
Range of an object launched on a downward hill
Replies
12
Views
912
Find the car's speed at point when deceleration is increased - Mechanics
Replies
26
Views
3K
Two decelerating trains on a collision course
Replies
2
Views
2K
Train collision (linear kinematics)
Replies
6
Views
2K
Motion puzzle: Bird flying between a train and a platform
2
Replies
84
Views
4K
Find the time taken to travel from top of slope to base - Mechanics
Replies
2
Views
1K

Hot Threads

Recent Insights

Back
Top