Questions tagged [velocity]
The time rate of change of the position of an object
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Is the answer given in the option wrong? [closed]
The question is
"An Object moves along a straight line. The graph illustrates how the acceleration of the object changes with time. The direction of the motion of the object changed only once, ...
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Doppler shift from a moving reflector and source if only the relative velocity is known?
Suppose there is a device which is producing and listening to sound (sonar), a reflector is moving with respect to device and the velocity of reflector and device with respect to the air is not known, ...
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Interpretation of a motion in continuum mechanics with a spatial description
in the book introduction to continuum mechanics 4th edition (Michael Lai, second chapter), there is an exercice about a motion of a continuum (exercice 3.2.1).
the motion is $$x1 = X1 + k.t.X2 ;$$
$$...
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How to properly combine kinetic and gravitational time dilation effect?
I developed a time dilation calculator that includes both kinetic (Lorentz Factor) and gravitational (Schwarzschild Metric Formula) factors to assess the time difference between Earth and satellites. ...
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How does the direction of the change in momentum of the object change during the motion?
In the case of an object's movement resembled in this graph, as the gradient is decreasing, a decrease in velocity occurs.
According to the formula
$$p = mv$$,
The momentum is directly proportional to ...
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When does magnetic force affect the velocity of a charged particle
So according to this para, I understand that since one component of velocity is perpendicular to magnetic force (and parallel to magnetic field) that component will not change. But other component is ...
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Newton's laws on constant velocity [duplicate]
We know that Newton's second law tells us $F=ma+v\frac{dm}{dt}$ so, if a body has a constant velocity but a changing mass, then the equation tells us that the net force acting on the body is $F=v\frac{...
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Friction acting on a moving car
I am trying to understand the nature and direction of friction force acting on from the ground a car driving up an incline.
I was thinking about a simple situation where a car of mass $ m $ is driving ...
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How many $G$ of accelaration do we experience when we come to a flat surface from a slope?
I was recently riding a bicycle when I realised that when I went onto a flat road from a short but steep slope, I felt something weird in my body as if I was expereiencing some difference in the ...
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Does a block's velocity becomes zero when it hits a spring?
It says the velocity of the block becomes zero at the instant of maximum compression. But does it not go with a constant velocity as it's a smooth part? It should hit the spring and then oscillate for ...
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What is the tangential component of any vector?
There's a statement I discovered in the book I am reading which says
Kinetic energy changes only when speed changes and that happens when the resultant force has a tangential component.
Does that ...
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Total momentum of a fluid in a pipe [closed]
Suppose we have a cylindrical pipe let's say length L = 10
m and radius R = 1 m through which water is flowing. The velocity distribution is given by Poiseuille's Law: $v(r)=\frac{\Delta P}{4L\eta}\...
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Velocity Needed For Water To Overcome Adhesion Force To A Rounded Steel Inclined Plane
Context: I work at a fast food restaurant with a 3-module sink. The sides are slightly angled down to allow the water to trickle down into the compartments. I found that water clings to the side of ...
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What is the science behind why when displacement is increased, so will the final velocity? [closed]
I'm writing a paper and need to write a hypothesis. I did an experiment using a weighted cart with a string and falling mass, and also a pulley. This was completed on a flat table onto the floor. In ...
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Does QED explain why Moving charge produce magnetic field? [closed]
I wonder that moving charge produce magnetic fields. Now a days quantum field theory explain much of particle physics their underlying mediate particles.
But can QED explain why moving charge produce ...
