All Questions
Tagged with velocity acceleration
463
questions
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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, ...
1
vote
2
answers
53
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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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2
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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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5
answers
92
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Motion formula gives correct answer but without formula gives wrong answer [duplicate]
Assume a body with initial velocity= 10 ms final velocity= 20 ms and acceleration= 2 ms , so the time to reach final velocity will be 5 seconds. If we try to find distance it will travel in 5 seconds ...
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14
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4
answers
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Why doesn't constant acceleration give me total displacement?
I started learning 1D kinematics and learnt definitions of constant velocity and constant acceleration. I thought that if a particle is changing its velocity uniformly then it has constant ...
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4
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Why acceleration is not always parallel to velocity but velocity is always parallel to displacement? [closed]
Velocity is derivative of displacement :
$$\vec v=\frac{\mathrm {d\vec r}}{\mathrm dt}$$
And acceleration is derivative of velocity.
$$\vec a=\frac{\mathrm {d\vec v}}{\mathrm dt}$$
Given that their ...
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80
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In $a = dv/dt$, is $a$ the net acceleration? [closed]
While going through the calculus approach to accelerate, we have,
$$a = dv/dt, $$
I think, here, v and a should be in the same axis,
is my process correct?
in a planar motion in two dimensions, it ...
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2
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54
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Magnitude of Acceleration Vector when Speed is Constant
If I observe a change in direction of velocity, but not in speed: What does the acceleration vector look like?
I am confused! The difference vector between two vectors of equal length A has a ...
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2
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81
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How do I calculate frictional forces of an object sliding laterally on a sloped plane?
Game developer here. Most problems about objects sliding down sloped planes with friction are about the object sliding in the natural downward sliding direction of the slope. But how would you ...
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15
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Track an object velocity in a 2D plane
I would like to track the motion (actually, I am more interested in the velocity) of an object in a 2D plane (typically 4m x 4m). The object speed is typically 10cm/s, but the mouvement may be chaotic ...
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4
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2
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383
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Does acceleration or deceleration affect the strength of impact if velocity is the same?
2 identical cars both hit a wall at the same exact speed (let's say 50 mph), but one car was speeding up to 50 mph and the other car was slowing down to 50 mph. Also let's assume that the cars are ...
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Why is it that objects inside a moving train tend to move at the same speed as the train itself?
I mean I get people saying because it's Newtonian mechanics. Everything inside the train will have same speed as that of train but my question is why ? Why is it like that ? And How does that happen ?
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1
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111
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Drone in an elevator
I just watched this video, What Happens If You Fly a Drone In An Elevator? Real Experiment!
To my surprise, the answer was not what I expected. I thought the drone would stay stationary. My thought ...
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In a uniformly accelerated motion experiment, the acceleration can be attained from $V_{ave}$ vs. $t/2$ and $x$ vs. $t^2$ graph. How is this possible?
Specifically, in the experiment, we had to release a glider from an inclined plane (that had an angle of inclination of 10 degrees). We had to calculate the time it reaches the final position. We had ...
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Interpretation of velocity-velocity and acceleration-acceleration curves
I am parametrizing equations of motion in the form:
$$x(t) = x_0+v_{0,x}t\\y(t) = y_0+v_{0,y}t+\frac{1}{2}at^2$$
The parametrized equation with respect to time:
$$y(x) = y_0+v_{0,y}\cdot \frac{x - x_0}...
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