All Questions
11 questions
3
votes
5
answers
197
views
What happens physically when object is thrown up when $v$ becomes 0 at max height?
When velocity=0 during maximum height when an object is thrown up, what does that actually mean?? does that actually mean that the object doesn't change it's position over dt time period when at ...
- 12.9k
0
votes
1
answer
90
views
An object falling from very far would have varying acceleration, how can that be accounted for?
I want to have a function that describes where a falling object is.
Like this one:
h(t) = -g*t²/2
But this one is for the usual close to the surface case, where there is no variation of gravity due to ...
- 61
0
votes
7
answers
404
views
Vertical motion of an object
We define acceleration as $-9.8\frac{m}{s^2}$ for an object that is thrown upwards due to gravity. My question is when the object reaches maximum height at the point where it is about to turn around ...
- 1,200
1
vote
1
answer
103
views
Acceleration vs. time from acceleration vs. distance [closed]
Let's say we have two point bodies, each of mass of 1 unit, 1 unit apart. If we exclude any external forces, gravity starts slowly pulling them towards each other. At some point, the bodies are ...
- 11
1
vote
1
answer
48
views
Calculating a free fall vector so its equals to its inverse vector while accounting for gravity
I'm a game developer, and I've been struggling with a kinematics problem in the development process of my current project.
I have some stationary objects that are suddenly affected by gravity after a ...
- 213k
0
votes
3
answers
2k
views
Accelerometer measures 1g along z-axis
I have an accelerometer which measures 1g along the z axis when resting on a table. I don't understand why this is because the net force on the accelerometer is zero along the z-axis as the force of ...
- 99.9k
0
votes
2
answers
643
views
If an object in free-fall is moving upward, the object's velocity is decreasing. Does this mean that the acceleration is -9.8 m/s/s?
I have a problem (that I am not asking you to solve) where it takes $4s$ for an object to travel upward to its maximum height, and we have to determine how far the object travelled. If the ...
- 99.9k
1
vote
3
answers
544
views
Question about drop tower deceleration
I have a really basic question.
If we release an object from a drop tower $700\, \mathrm{m}$ tall, the object free falls for $500\,\mathrm{m}$ and reaches a velocity of $99\mathrm{\frac{m}{s}}$.
For ...
- 99.9k
0
votes
3
answers
2k
views
Does a ball, when thrown into the air, ever experience an instant of rest? [duplicate]
Say I walk outside and throw a ball into the air. Obviously it will decelerate as it travels upward due to Earth's gravity, and accelerate as it travels downward for the same reason. But is the ball ...
- 151
8
votes
3
answers
7k
views
Integrating radial free fall in Newtonian gravity [duplicate]
I thought this would be a simple question, but I'm having trouble figuring it out. Not a homework assignment btw. I am a physics student and am just genuinely interested in physics problems involving ...
- 77.3k
0
votes
1
answer
134
views
Direction of $g$ acceleration ball projection
Why is the answer A? Because I thought it's C, because g acts downward and since the ball is moving downwards towards N, acceleration should be "g" and not "-g" as it was when it was being thrown up ...
- 213k