All Questions
Tagged with newtonian-gravity free-body-diagram
137
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Question about applying Maxwell's Equations to analyze a copper shaft and magnetic bearing
fellow physics people I have a question regarding the mathematics behind how a magnet will slow down as it falls through a copper pipe. I am aware of the mechanism in which this works, the falling ...
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2
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1
answer
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What happens to a person in an elevator with a downward acceleration greater than $g$?
So I've been learning about the apparent weight of a person in an elevator accelerating upwards or downwards. I learnt that:
If it accelerates upwards with an acceleration a, Apparent weight = m (g+a)...
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2
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124
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If a box is at rest on an inclined plane, as you increase $\theta$, $F_n$ decreases but $F_f$ increases? [closed]
If $F_f =\mu× F_n$, then why does $F_f$ increase when $F_n$ decreases?
[Here $F_f$ is frictional force, $F_n$ is normal force and $\mu$ is coefficient of friction]
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-3
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Accelerating downwards faster than gravity
What would happen if you were in an elevator that was falling downwards with a acceleration and a>g? I found an answer on this site that said that you'd hit the ceiling of the elevator. I ...
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2
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Where do we use the maximum? [closed]
In the above problem,we have been asked to find the maximum value of $\frac{M}{m}$. But the solution the book ended up giving is the normal balancing of forces in free body diagram and came up with ...
- 1,179
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3
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85
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What happens to the reaction pair? [duplicate]
We know that normal force and gravitational force are not action-reaction pairs but what happens of the reaction force of normal force and $mg$ of Earth?
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510
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If every force has an equal and opposite reaction and gravity pulls you down, where is the opposite reaction to gravity? [duplicate]
If every force has an equal and opposite reaction and gravity pulls you down, where is the opposite reaction to gravity? how come the earth doesn't turn inside-out?
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Stationary on a geodesic
If the Earth were not spinning or orbiting the Sun would we still feel gravity?
I ask because it seems to me that in that case we would not be accelerating and we would still be standing on a geodesic ...
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2
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Do we ignore weight of the rod in vertical spring-block system?
Problem: The first spring is placed at the
middle of the rod and the second one at the end as shown in the figure. If the end of the rod is slightly pulled up and released,
determine the angular ...
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13
votes
4
answers
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Why do we feel weightlessness in water but not on land?
When we draw a Newtonian free body diagram of a man standing still on land, we draw force g and the reaction force. In water when floating still, we still have force g but we also have the reaction ...
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6
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129
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Cancellation of forces in feeling weight
If we are on the ground, Earth's center attracts us by $mg$ force and the ground also exerts $mg$ force in the upward direction. Those two forces cancel out. So there is no net force acting on us now. ...
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Problem with Action-Reaction pairs and gravity [duplicate]
There are lot of question on this site similar to this, but they give contradicting opinions.
When standing on earth, my gravitational pull to the earth and earth's gravitational pull towards me ...
2
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3
answers
198
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Problem with gravity
Sorry if this question is dumb, but I don't seem to have a grasp on it.
Suppose you are on a rock in space, with no external forces acting. The rock attracts you with a force given by
$$F=G\frac{...
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3
answers
631
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Why is the normal force and the tension force greater than the weight in these examples? [closed]
A pendulum is suspended form the roof of an accelerating train. If it stays in equilibrium with respect to the train then an observer at rest will find the bob accelerating with the train. He will ...
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What is the force pair for the normal force? Clarification on Newton's 3rd Law
In the process of trying to wrap my head around Newton's 3rd law I've come across 2 definitive statements.
Forces must occur in pairs
Forces must act on different bodies
This is confusing to me when ...
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