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0 votes
2 answers
165 views

The mechanics of retention of velocity/acceleration when an object is dropped from a moving body

This might seem a stupid question but please help me out because I'm very confused. We say that when an object is dropped from a moving body (moving with constant acceleration $a$) It has the ...
user144613's user avatar
1 vote
2 answers
295 views

A question regarding inertial reference frame

We define a non-inertial reference as a reference frame which is accelerating. But the question is if it is the reference frame itself what is it accelerating with respect to? For simplification ...
Anom Ahmed's user avatar
1 vote
6 answers
379 views

How can a particle which is not moving have an acceleration?

Suppose a rod is rotating around a fixed point located at an extreme point of it and there are two points on it. One, somewhere in the middle and the other at the other extreme.Call them $A$ and $B$ ...
Aaryan Dewan's user avatar
  • 1,770
11 votes
3 answers
7k views

How can you accelerate without moving?

I know this question has been asked in other forms, generally regarding the balance of forces. This time I want to focus on motion. I've got a laser accelerometer on my desk. It tells me that I'm ...
user avatar
7 votes
1 answer
2k views

What is my acceleration in my own frame?

This is , I suppose not a good question , but I think I am missing something which confuses me in this question. So my question is: Velocity is relative. So suppose a car is moving at a speed $200 \;\...
Shashaank's user avatar
  • 2,797
2 votes
5 answers
2k views

Why was it difficult to walk in the same direction the train's acceleration, and easier the other way around?

The other day while I was walking in the same direction that the train was accelerating. Then I came across this question. Please if would answer it, I am very curious to know. But when I walked the ...
Tahmeena's user avatar
0 votes
2 answers
1k views

One dimensional motion - Why does a ball fall back in my hands when I throw it up in a moving bus? [duplicate]

Suppose you are moving in a bus and you throw a ball upwards. Why does it always land in your hand and does not fall behind you? The bus is moving with a uniform velocity in a straight direction. Now ...
Some Name's user avatar
  • 125
1 vote
1 answer
116 views

Acceleration of log moving without slipping with/under a plank

So I have this image: I know how to solve the accompanying physics problem once I have determined the relative accelerations of the logs and the plank. According to my physics textbook, the cm of ...
Paula's user avatar
  • 93
1 vote
1 answer
745 views

Smooth collar sliding down smooth shaft [closed]

For part (a), we find that the acceleration of the collar is $6.94~\mathrm{m/s^2}$. In part (b), we say that the acceleration of B with respect to A is $6.94~\mathrm{m/s^2}$, which makes sense. ...
Edward Newgate's user avatar
1 vote
2 answers
406 views

What is the relative acceleration of a projectile fired at in a low gravity vacuum?

This question is to end an old argument. Given a (space) vehicle with an acceleration of X, and projectile with an acceleration of 2X (rocket, not bullet), what would the relative acceleration of the ...
Tritium21's user avatar
  • 113
1 vote
1 answer
416 views

Why is speed/position relative but acceleration not? [duplicate]

I think i understand it now, if found this: link I know that position and speed are relative. There is no such thing as universal coordinates. Then why is acceleration absolute? Is the 3th and 4th ...
ultraking x2's user avatar
1 vote
1 answer
513 views

Relative acceleration with pullys

I have tried this question every way I can think but in the equation for particle $L$ $g$ cancels every time. Could someone show me how to do it correctly or tell me what I am doing wrong. Thanks, ...
user's user avatar
  • 316
16 votes
7 answers
11k views

Is acceleration relative?

A while back in my Dynamics & Relativity lectures my lecturer mentioned that an object need not be accelerating relative to anything - he said it makes sense for an object to just be accelerating. ...
user27182's user avatar
  • 1,657

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