The time rate of change of the position of an object
Questions tagged [velocity]
2269 questions
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Special Relativity Question: Massive particle racing light
I'm a bit rusty on my special relativity and have been thinking about this problem recently:
Suppose that a massive projectile (i.e. something large enough that we could see with a telescope) is ejected from the Sun towards the Earth at 0.9c at…
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What is the difference between $\frac{v_f + v_i}{2}$ and $\frac{\Delta x}{\Delta t}$, assuming acceleration is constant
It looks to me that both arrive at the same place, the average velocity. Do I use whichever one based on the data available to me?
asdfjkl
- 21
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What is the fastest tangential velocity?
What is the fastest tangential velocity, that was reached by a man-made object? I have only found examples of angular velocity.
More specifically, I am looking for the speed of the rim of spinning objects, not ions in an accelerator or satellites in…
mario
- 23
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Why does velocity add up to all objects inside a moving container?
Imagine I would be on a mobile belt-conveyor and throw a ball in the air, then the ball would not fall in my hand, because I move to the right but the ball does not, just like this:
However, if I would be in a wood-box and throw a ball up, it…
Adam
- 187
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2 answers
Derivation of Velocity of separation and velocity of approach
Can I have a clear cut dimension or difference between velocity of approach and velocity of separation?
In just simple 1D motion.
Considering two rigid spherical masses of different masses and moving with different velocities.
Rohan
- 13
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Determining Maximum Velocity of an object traveling horizontally
I'm in the process of working on a physics related game. I'm looking to find the maximum velocity of an object given it's mass and the force acting on it when it is traveling horizontally. I believe there must be a method of calculating this but…
dhatch387
- 121
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4 answers
How does one measure velocity in space?
Just what the title states.
Velocity, by definition, is the distance covered in a defined amount of time. How does one measure the velocity of a spacecraft that is not in Earth Orbit? E.g. Beagle
EDIT:
I qualified the location as outside of Earth…
Everyone
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At what velocity was this car traveling?
Throughout schooling we are given problems in which we are to solve for velocity, force, mass, etc. I have a real life situation in which I would love to solve these exact things. Please consider: Car A is a minivan stopped at a driveway, waiting to…
Sismart
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Knock out drum sizing for 10 times velocity reduction
How can I size a drum such that the velocity is reduced by 10 times inside the vessel.
My velocity in the pipe entering the drum is 9.77 m/s. Velocity inside the drum should be 10 times less than 9.77 m/s
Dhanasekaran
- 33
0
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Predicting acceleration along curve based on degrees
Not even sure if this is the right place to post this, but please let me know if not! I'm a physics newbie and trying to figure out what this method is called.
I have a line with some curves and a hard angle. I'm trying to do a really basic…
john
- 101
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Motion Along a Straight Line: Calculate velocity of a stream
A swimmers speed along the river is 20 km/h and upstream is 8 km/h. Calculate the velocity of the stream and the swimmers possible speed in still water.
I understand what the variables are and I understand what it is asking to find, but what I'm…
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Doubts in understanding the instantaneous velocity
I was studying about the fundamentals in physics and I read a defination of average velocity. It was like that average velocity is a physical quantity which gives the measure of overall rapidity of a moving particle in a given time interval.
And it…
It's probable
- 529
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What's the velocity for a person falling from a building?
I saw that in the neighborhood a person fell our of 25th floor down the street (ground floor). I was intrigued by some questions about such situation, but all of them are out of one question: What's the velocity of a person falling from a building,…
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Velocity question which involved forward difference and back difference
Suppose one person at $t_0$ is at the location $p_0$
at $t_1$ is at the location $p_1$
at $t_2$ is at the location $p_2$
Then question:
this person velocity at $t_1$ is $(p_1-p_0)/(t_1-t_0)$
Or $(p_2-p_1)/(t_2-t_1)$ ? Which one has more physical…
ytyyutianyun
- 103
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Why do objects change its direction when their velocity reaches 0?
When you throw an object into the air, the object will decelerate by 10 or 9.8 meters per second per second due to gravity. When the object reaches its highest point, the objects velocity would be zero at a particular instant before it changes…
user97818