All Questions
13
questions
1
vote
1
answer
159
views
How to compute linear acceleration in 3D from change in roll, pitch and yaw angles?
We know that if a body is rotating only about $z$-axis along a circle of radius $R$ with an angular rate of $\omega$, then the acceleration of the body in 3D is $a = [0.0\ \ \omega^2R \ \ 0.0]$. Now ...
- 123
2
votes
1
answer
69
views
(Circular motion) Acceleration is given, so why asked for more? [closed]
The full question is below.
A car starts from rest and moves around a circular track of radius $32.0\,\text m$. Its speed increases at the constant rate of $0.500\,\text{m/s}^2$.
(a) What is the ...
- 21
0
votes
2
answers
328
views
Does a simple pendulum have some radial acceleration at its extreme positions where its speed becomes zero?
Suppose we have a simple pendulum swinging between two extreme positions. At the extreme position its speed becomes zero. As per this reason can I say that at extreme positions radial acceleration (v^...
- 1,357
0
votes
1
answer
579
views
I am very confused about net acceleration and angular acceleration in circular motion [closed]
I have seen in many places that angular acceleration can be zero but net acceleration can't be zero in circular motion. I want to know whose components are tangential and radial acceleration (net or ...
- 51
6
votes
5
answers
1k
views
Finding accelerations using Instantaneous axis of rotation
Disclaimer: I present a question which is homework-like, However it is simply to demonstrate an example. I only wish to clarify one thing, that is the validity of the IAR in determining the ...
- 1,295
1
vote
2
answers
3k
views
Find the time when tangential acceleration is equal to radial acceleration [closed]
A particle begins to move along a circular path of radius R with a constant magnitude tangential acceleration of $a_t$. After time $t$ it's the centripetal acceleration is equal in magnitude to ...
- 132
0
votes
1
answer
87
views
Can we measure little $g$ in this way?
If a cup of water (known mass) is whirled round at the end of a string, and we look for the exact angular velocity which makes water remain in the cup, is it possible, by knowing the force equilibrium,...
user153036
1
vote
1
answer
112
views
What will be the trajectory of the given motion [closed]
If it is given that component of acceleration perpendicular to the velocity of a body has a constant, non-zero magnitude, how can we mathematically prove that the trajectory of the body will be ...
- 212
3
votes
5
answers
20k
views
Radius of centripetal acceleration
Suppose you are moving in circle of radius $r$. So there should be centripetal acceleration towards the center. Now you want to decrease the radius of the circle, so someone should apply more ...
- 53
21
votes
8
answers
112k
views
A simple derivation of the Centripetal Acceleration Formula?
Could someone show me a simple and intuitive derivation of the Centripetal Acceleration Formula $a=v^2/r$, preferably one that does not involve calculus or advanced trigonometry?
- 373
0
votes
2
answers
733
views
How to treat an exercise about the rotational acceleration during a throw?
Because I am studying on my own, I don't have anyone to talk to about this when I don't understand, and I was wondering if someone could help me with a concept in rotational kinematics:
At the ...
- 101
1
vote
1
answer
537
views
Have I calculated Angular Acceleration correctly?
I am teaching myself basic mechanics from a standing start. I am trying to understand Angular Acceleration and have set myself a problem to solve. My answer 'feels' wrong, so I'd like some help to ...
- 11
0
votes
1
answer
205
views
Kinematics with non constant acceleration II [closed]
I'm getting crazy with this problem and I think that it's pretty simple.
An helicopter's helix is spinning at initial speed $w_0=200\ rpm$, all
of a sudden the motor stops and it decreases its ...
- 411