Differences in position in 2 very similar circumstances

  • Thread starter Thread starter extremcurious
  • Start date Start date
  • Tags Tags
    Position
AI Thread Summary
Jumping on a moving train results in different outcomes based on your position. When standing on top of the train, you will land behind your original position due to the forward motion of the train and air resistance. In contrast, jumping inside the train allows you to land in the same spot because you share the train's velocity. The discussion highlights the importance of understanding relative motion and the effects of external forces like air resistance. This illustrates fundamental principles of physics related to motion and reference frames.
extremcurious
Messages
13
Reaction score
0
I recently read in a book that if i am standing on the top of a moving train and i jump in the air i will land behind my original position. But if i am inside the train and i jump i will land exactly where i was originally! Is this true?? And if it is, then why does this happen?
 
Physics news on Phys.org
extremcurious said:
I recently read in a book that if i am standing on the top of a moving train and i jump in the air i will land behind my original position. But if i am inside the train and i jump i will land exactly where i was originally! Is this true?? And if it is, then why does this happen?

Think "air resistance". What is the difference between you riding in a car with all the windows up, and opening a window and sticking your hand out?

Zz.
 
Wow, it was that simple! I was thinking too much. Thanks for helping
 

Thread '1:1 versus 2:1 Mechanical Advantage debate'

The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
View full post »

Thread 'Newton's first law?'

Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
View full post »
Thread 'Beam on an inclined plane'

Thread 'Beam on an inclined plane'

Hello! I have a question regarding a beam on an inclined plane. I was considering a beam resting on two supports attached to an inclined plane. I was almost sure that the lower support must be more loaded. My imagination about this problem is shown in the picture below. Here is how I wrote the condition of equilibrium forces: $$ \begin{cases} F_{g\parallel}=F_{t1}+F_{t2}, \\ F_{g\perp}=F_{r1}+F_{r2} \end{cases}. $$ On the other hand...
View full post »

Similar threads

Running & Jumping Backwards on a Moving Train
Replies
11
Views
5K
Relative velocity inside a train
Replies
15
Views
5K
Jumping on a boat that is moving
Replies
7
Views
5K
I Reference frames in terms of homogenity/isotropy
Replies
18
Views
2K
Potential difference: positive or negative?
Replies
15
Views
4K
Why we jump with the same initial speed on 2 different planets?
Replies
18
Views
2K
Airplane wings -- How do they work and why do they change shape?
2
Replies
81
Views
11K
Pressure Differential in Fluid Dynamics: Why More on the '+s' Side?
Replies
5
Views
2K
Confused by different definitions of position
Replies
4
Views
2K
Newbie question -- A train in space with a ball floating in a train car....
Replies
5
Views
1K

Hot Threads

Recent Insights

Back
Top