All Questions
Tagged with relative-motion kinematics
21
questions with no upvoted or accepted answers
3
votes
2
answers
1k
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Upstream and downstream problem using relative velocity
On a river coast, there is a port; when a barge passed the port, a motor boat departed from the port to a village at the distance $S_1 = 15$ km downstream. It reached its destination after $t = 45$ ...
1
vote
1
answer
46
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Linearly Interpolating in a Non-Inertial Frame
I am working on an engineering task where we have a flying object which knows its height above a curved surface as well as how close it is to other flying objects. If I want to interpolate between two ...
- 171
1
vote
0
answers
80
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Vector addition of drone affected by wind
I've been struggling with this calculation for around a week and am starting to question whether or not it's even possible.
What I want to do is find the bearing and speed a drone will need to fly at ...
- 11
1
vote
1
answer
113
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Speed with wind resistance
This is probably a basic question, but it has been a while since I did anything like this.
If a boat is sailing forward at speed $x$ and the direction of the wind, with magnitude $y$, is either equal, ...
- 11
0
votes
1
answer
121
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Velocity of Separation and Relative Velocity
I have some problems in understanding a concept, which has been used in the problem in the picture:
I don't understand what are we actually using to solve this question. Are we using relative ...
0
votes
0
answers
41
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Minimum seperation of moving objects doubt
Let there be $2$ objects $P_1$(initial velocity $u$ $ms^{-1}$ & acceleration $a$ $ms^{-2}$) & $P_2$ (initial velocity $U$ $ms^{-1}$ & acceleration $A$ $ms^{-2}$) initially separated by ...
0
votes
2
answers
153
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Average speed / Velocity
We know that in kinematics we have the concepts about "average speed". By definition the average speed is the total of the distance divided by time, but I still don't get it what is the ...
- 1
0
votes
2
answers
74
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Sign convention for relative displacment
If an object A is $X\ \mathrm m$ behind B,than the relative displacemnt of A wrt B would be $-X$. However is object A was moving towards B(at rest) at a rate of $Y\ \mathrm{m/s}$, then $$V_{ab}=+Y-0=+...
- 41
0
votes
1
answer
107
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CoM-and-relative velocity
In our scrip we are considering the elastic collision between two particles, one with inital velocity $\vec v$ and the other $\vec w$. We also consider that the particles have the same mass.
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- 1,398
0
votes
0
answers
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On a rainy day, a man is running on a hilly terrain in such a way that he is always finding the rain drops hitting him vertically
It is assumed that rainfall is uniform in the whole terrain from O to E(figure attached) When the man was at rest on stretch OA, he found the rainfall at an angle of $30^o $ with the vertical.
What ...
- 309
0
votes
1
answer
38
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Direction of $V_RM$ confusion
So ,please read both the questions . They have similar originate questions that I am facing difficult in.
Let us say rain is falling downwards with v = -5j and a man is moving with a velocity of 2i in ...
- 725
0
votes
0
answers
59
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Discretizing kinematics of moving object
I think this is a simple question, but I'm unable to find the relationship:
The relative distance between two objects at any time $t$ can be written as:
$x_r(t)=x_{ro}+\int_{t_0}^{t_f}v_r(t)dt$
where:
...
0
votes
2
answers
72
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Do the time taken to travel a fixed distance changes in two different inertial frame of reference in relative motion
I have calculated time taken to travel a fixed distance by the object from two different frames of refrence. One frame was moving with uniform velocity wrt other . But time taken to cover the equal ...
- 1
0
votes
1
answer
117
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Relative motion between two particles
I already know the relation of relative velocity as :
Vab=Va-Vb
So is there any derivation for this relation or is just how it is defined?
Relating to this i am finding some hard time to imagine why ...
0
votes
1
answer
238
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How would one compute the path of an particle's motion from forces defined in different frames of reference?
I'm trying to write a computer program to render and play-back the path of a particle existing in 2D space given all forces acting on said particle. This is relatively easy to do if all forces are ...
