All Questions
Tagged with relative-motion kinematics
171
questions
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499
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Relative Velocity of two particles [closed]
If two particle are neither approaching towards nor receding away from other then their relative velocity is non zero.
How is this possible??
- 318
0
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2
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431
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Why distance between 2 particles is independent of frame?
I was solving question in kinematics related to minimum distance between particles there they said that distance between two particles is independent of frame the distance they both measure between ...
0
votes
2
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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 ...
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3
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2
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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 $t = 45$ ...
0
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2
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557
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Why do two objects at distance of closest approach have equal velocity?
So, Here is a proof I came up for it,
Define relative position function $x_1$ is position of body-1 and $x_2$ of body-2:
$$x(t) = x_2 (t) - x_1 (t)$$
Then finding the maxima of this function leads us ...
- 7,980
1
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1
answer
278
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Relative velocity during a collision
I quote Resonance Kota module on Mechanics(Vol.1):
The collision is just avoided if relative velocity becomes zero just at the moment the two cars meet each other.
I don't understand why should it ...
- 11
-2
votes
1
answer
69
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Problem regarding relative velocity [closed]
Train A moves north with speed 54km/h. What is the velocity of a monkey running on roof of a train A against its motion (with velocity of 18km/h with respect to A)as observed by a man standing on ...
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0
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1
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298
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Relative velocity of a particle under uniform circular motion
The question is based on fairly simple mechanics principles but seems to have no definite answer.
Suppose there is a point particle A at a point X and around it another particle B in uniform circular ...
- 335
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2
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113
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Is there a physics law according to which, in general, the smaller an object is, the faster it moves? [closed]
I have always felt, in general, that dogs run faster than humans and that birds fly faster than dogs and than bees can fly or at least drift by the wind faster than birds and that plant seeds would ...
user256067
1
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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
0
votes
4
answers
239
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Motion and the Universe
In physics class today, I learned that motion is relative, and to determine if an object is moving or not, you need to have a stationary reference point.
Well, that got me thinking:
How can you ...
1
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1
answer
277
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Why do tires move forward?
I have heard a lot of people saying that when the tires of a car rotates backward, a friction acts in forward direction on the tire and the car moves forward.
Now according to my physics book,
" ...
user223406
1
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2
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337
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How do I interpret/make sense of $\frac{d\theta}{dt}$ in physics’ language?
Here’s a question from my textbook. It’s a simple question that involves a little bit of calculus. I was able to solve it. But what I don’t understand is, I could not fully understand the final result....
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Would a speed camera register more speed if it moves in the opposite direction than the object it's measuring?
Earlier today, I was talking with my friend about speed cameras measuring different speeds when moving.
This is the situation:
I am the red car and I'm driving ...
- 101
0
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3
answers
62
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From the frame of reference of a colliding object, does the entire universe change direction when it bounces?
Consider three objects: a rubber ball, a spaceship, and an isolated brick wall floating serenely in the vacuum of space.
From the perspective of an observer on the spaceship, the ball is moving ...
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