All Questions
42
questions
0
votes
1
answer
101
views
To consider or not to consider potential energy of a mass attached to a spring in oscillation? [closed]
For the above system I have the following expressions for kinetic and potential energy:
$$
V = \frac{1}{2}\,k\,x^{2}+m\,g\,l\,(1-cos\,\theta)-m\,g\,x\\ T = \frac{1}{2}\,m\,\dot{x}^{2}+\frac{1}{2}\,m\,...
- 3
3
votes
2
answers
108
views
Why do we include $x$ in this Spring Equation?
I am currently in Physics 1 and we are learning about Energy. This may sound like a dumb question but I am currently trying to understand this. Here is the question of the problem:
A 10kg block is ...
1
vote
1
answer
4k
views
Potential energy of a mass-spring system
I'm having trouble with determining the potential energy of the mass-spring system depicted below. We assume that the extensions of all 3 springs are zero when $x_1=x_2=0$. The potential energy that I ...
- 192
1
vote
0
answers
98
views
Potential energy stored by an elastic circular loop on deformation to an ellipse
This question is related to an origami circular loop that I built. This structure is elastic and I intend to find the elastic potential energy stored by it when I deform it to an ellipse.
My actual ...
-1
votes
1
answer
143
views
Spring-mass problem [duplicate]
Question: A spring-mass system hangs vertically from a fixed support. The natural length of the spring is l. The block is displaced from the equilibrium position and constrained to move horizontally. ...
-2
votes
2
answers
481
views
In this question of elastic potential energy, why doesn’t the answer of compression come negative? [closed]
A smooth curved track terminates in a smooth horizontal part. A spring of spring constant $400N/m$ is attached at one end of a wedge fixed rigidly with the horizontal part. A $40g$ mass is released ...
- 153
-1
votes
1
answer
412
views
How to derive spring potential formula from Hooke's law?
I found this answer in another forum:
\begin{align}
W&=\int \mathbf F\cdot {\rm d}\mathbf x \\
&=-\int_0^xkx\,{\rm d}x \\
&=\frac{1}{2}kx^2
\end{align}
I don't understand why we have to ...
- 11
0
votes
2
answers
2k
views
Question regarding bungee jumper [closed]
A man who does bungee jump jumps by the platform. The mass of the man is 60Kg . There is 45m from the platform to the water. Without stretching the rope is 25m long. The spring constant(k)=160Nm-1. ...
- 222
0
votes
2
answers
2k
views
Getting 2 different answers when finding spring constant $k$ when gravity is involved
OK, so I've been wracking my brain for the past hour trying to figure out how to calculate k in a problem like this:
A mass of 10 kg is attached to a spring hanging from the ceiling. It is released,...
1
vote
2
answers
3k
views
Hanging mass from spring/ Setting potential to 0
I'm working a problem from Taylor's Classical Mechanics Book, and it's highlighted a couple issues I never quite wrapped my head around (despite getting good marks in advanced undergrad mechanics and ...
- 171
1
vote
1
answer
315
views
Finding the spring compression length for an object to reach $U = 0$ [closed]
I have a question on the following, pertaining to only parts c and d (b was shown to provide the mass of the asteroid and radius):
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I'm going to define the mass of the asteroid here as $M_A$ and ...
- 3,200
-2
votes
2
answers
1k
views
Question related to Potential Energy - Mass Spring System [closed]
The P.E stored by a mass spring system at an extension of 2cm is 10J. The P.E stored by the same system at an extension of 4cm will be?
Someone please provide an extensive answer if possible.
- 1
0
votes
2
answers
4k
views
Potential energy of an Atwood Machine [closed]
The two weights on the left have equal masses $m$ and are connected by a massless spring of force constant $k$. The weight on the right has mass $M=2m$, and the pulley is massless and frictionless. ...
- 171
-2
votes
2
answers
3k
views
How to solve a spring question?
What is the difference between the distance a spring is stretched using $F=kx$ formula vs the distance using the work formula? They seem to give different answers.
Doesn't distance stretched using ...
- 823
-1
votes
1
answer
1k
views
Maximum height mass attached to a vertical spring with conservation of energy
There are various methods to find anything we like for a mass attached to a vertical spring, however I wanted to use the conservation of energy.
Suppose $m$ hangs from the spring of normal length $l$ ...
- 247