Tagged Questions
0
votes
0answers
14 views
Spring constant problem [closed]
Say, a spring AB is hung from the ceiling, a block of mass m is attached to B. Another spring CD making angle A with the vertical is attached to side B. What will happen next? Can the system stay in ...
1
vote
1answer
63 views
How do determine the equation of motion of slinky?
I'm trying to analyze the forces exerted to slinky. First, I've divided both ends.
The red vector is the force exerted by slinky itself, and the green vector is gravitational force.
Force exerted ...
3
votes
0answers
64 views
Effective mass in Spring-with-mass/mass system
Suppose you have a particle of mass $m$ fixed to a spring of mass $m_0$ that, in turn, is fixed to some wall. I'm trying to calculate the effective mass $m'$ that appears in the law of motion of the ...
0
votes
2answers
58 views
Time period for spring connected body
Two identical springs with spring constant $k$ are connected to identical masses of mass $M$, as shown in the figures above. The ratio of the period for the springs connected in parallel (Figure 1) ...
-4
votes
1answer
47 views
High School Physics student needs help [closed]
A human cannon has a spring constant of 35 000 N/m. The spring can be extended up to 4.5m. How far horizontally would a 65kg clown be fired if the cannon is pointed upward at 45 degrees to the ...
0
votes
1answer
38 views
Period of oscilation [duplicate]
Two masses $m_1$ and $m_2$ are connected by a spring of spring constant $k$ and slide freely without friction along horizontal track. What is period of oscillation? No force influence.
2
votes
1answer
124 views
Two masses attached to a spring
I'm trying to understand the solution of the following problem.
Two masses $m_{1}$ and $m_{2}$ slide freely in a horizontal frictionless track and are connected by a spring whose force constant is ...
0
votes
0answers
36 views
How can I find the frequency? [duplicate]
Grocery stores often have spring scales in their produce department to weigh fruits and vegetables.
The pan of one particular scale has a mass of 0.5 kg, and when you place a 0.5 kg sack of potatoes ...
0
votes
0answers
51 views
Frequency with the spring scale [closed]
Grocery stores often have spring scales in their produce department to weigh fruits and vegetables.
The pan of one particular scale has a mass of $0.5 kg$, and when you place a $0.5 kg$ sack of ...
3
votes
2answers
162 views
Nonuniform acceleration due to rubber rope
What I want:
I have a rubber rope which is $5m$ in length when not stressed and is able to stretch about $100\%$ (to $10m$ long). I want to accelerate a constant mass horizontally, which has ...
0
votes
1answer
78 views
Simple harmonic oscillator system and changes in its total energy
Suppose I have a body of mass $M$ connected to a spring (which is connected to a vertical wall) with a stiffness coefficient of $k$ on some frictionless surface. The body oscillates from point $C$ to ...
0
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0answers
44 views
Dynamics of an object hitting a spring [closed]
In a one dimensional universe, there is an object of mass m, heading towards a spring (which is attached to a wall of infinite mass) of spring constant k, at a constant speed of u (i.e. acceleration ...
1
vote
1answer
104 views
rate of change of spring potential energy $\frac{dU}{dt}$
Suppose we have a setup like this. In orange are two wooden sticks sort of things, and they are attached to the block of mass $m$(as usual) at a joint which is hinge type something. A similar ...
0
votes
0answers
102 views
Calculating effective spring constant of trampoline [closed]
A gymnast bouncing a trampoline is performing vertical oscillations. If he bounces very gently, his feet remain in contact with the trampoline at all times. This motion is approximately a simple ...
0
votes
2answers
195 views
Two blocks connected by spring on frictionless surface and Newton's third law
Suppose there is the following situation:
Blocks $A$ and $B$, with masses $m_A$ and $m_B$, are connected by a
light spring on a horizontal, frictionless table. When block $A$ has
acceleration ...
0
votes
1answer
146 views
Hooke's law, springs
A spring AB with constant k is hooked in the end A to the ceiling. At the end B of the undefomed spring is hooked a mass of weight 100N. At $t=0$ the mass is let free with no initial velocity. Not ...
0
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0answers
21 views
There's a ball and aspring in this one [closed]
There's a spring (k= 1 N/cm) hanging from the ceiling. a ball (m= 30 g) is thrown upward and it hits the end of the spring at t=0 with the velocity v0=0.3m/s and makes the spring compressed. How long ...
0
votes
0answers
102 views
Spring with mass [closed]
A block of mass $M$ is attached to a spring that has mass $m$ and the force constant $k$. The block is placed on a horizontal frictionless surface. Find the period of small-amplitude oscillations ...
0
votes
0answers
66 views
Mass spring system, increase mass [closed]
The question says that after a mass $m=M$ (attached to a horizontal spring) reaches its furthest point, so at its amplitude, the mass is doubled, $m=2M$.
What happens to the period, amplitude and ...
0
votes
3answers
186 views
where did I lose the negative sign when spring is in compression in a mass-spring problem?
Most books just tells you that spring force is $-kx$ since it opposes motion and to just write $mx''=-kx$ regardless if the spring is in tension of compression.
But when I try to derive this using ...
0
votes
1answer
61 views
Spring extensions
A certain spring has attached to it a mass of 25 units: on increasing the load by 6 units it extends 2.5 cm.
a) What is the time of oscillation under the original load?
b) What will be ...
0
votes
3answers
837 views
How to derive the period of spring pendulum?
So I wanted to find out how to (simply, if that's possible) derive the formula for a period of spring pendulum: $T=2\pi \sqrt{\frac{m}{k}}$. However, Google doesn't help me here as all I see is the ...
3
votes
2answers
309 views
Dynamics of a Vertical Mass-Spring Simple Harmonic Oscillator with Gravity
I am having some trouble obtaining the elastic potential energy and gravitational potential energy of a simple mass spring system.
In this experiment, masses attached to a spring were dropped from a ...
1
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0answers
134 views
Potential energy of a spring
I have a little problem with the potential energy of a spring... I hope you can help me!
I have two coupled pendula, given by two masses $m$ fixed to two rigid bars (that haven't any mass) and with ...
0
votes
1answer
478 views
Mass-Spring Damper system - moving surface
I need help with a physics problem, I don't know much about dampers, how can this be solved?
we have
$y_0(x)=\mu\sin(\Omega x)$
We arrive at this equation for motion (where we define $b$ and ...
-1
votes
1answer
50 views
Is this $W_{r} = \frac{1}{2}kx^2 $ procedure correct [closed]
I have a $0.40 Kg$ of mass that has $v= 0.5 m/s$, and then crashes with a spring with constant $k = 750N/m$
Whats the distance that the spring was compressed?
I was using the equation $W_{r} = ...
0
votes
2answers
145 views
Calculating restorative force with Hooke's Law [duplicate]
Possible Duplicate:
Mass points of a Mass-spring model
Say I have a spring like the one in the picture below:
The point at the top is fixed to a ceiling.
The red coloured arrow is the ...
0
votes
1answer
240 views
Mass points of a Mass-spring model
Let's say I have a mass spring model like the one in the picture below:
So, there are 3 parts of the spring joined together in an equilateral triangular manner. Each of the joints has a mass of ...
0
votes
2answers
149 views
Understanding the concept of period of motion in simple harmonic motion formula
I have a spring system, whose position equation is $$x(t) = c_1cos(8 \sqrt{2}t) + c_2sin(8 \sqrt{2}t)$$
The textbook says it will have a period of motion of $\frac{2 \pi}{(8 \sqrt{2}t)}$. I ...
1
vote
4answers
603 views
Spring-mass system with two springs and three masses
I'm trying to solve a system of springs and masses that is confusing me.
First, the balls are all lined up linearly. Secondly, the ball in the middle has a smaller mass $m$ while the first and last ...
0
votes
1answer
143 views
Spring-mass physics homework question [closed]
I've been having trouble with my physics homework. The problem is:
You may have measured the properties of a simple spring-mass system in the lab. Suppose you found ks = 0.9 N/m and m = 0.01 kg, ...
0
votes
1answer
430 views
Maximum Kinetic energy of a spring
The block in the figure below lies on a horizontal frictionless
surface and is attached to the free end of the spring, with a spring
constant of 35 N/m. Initially, the spring is at its relaxed ...
0
votes
2answers
263 views
Linear motion with variable acceleration
Consider the following problem
I pull a mass m resting at x = 0 on a frictionless table connected to a spring with some k by an amount A and let it go. What will be its speed at x=0?
I know how to ...
0
votes
0answers
499 views
Finding the period and frequency for simple harmonic motion [closed]
A 1 lb weight is suspended from a spring. Let y give the deflection (in inches) of the weight from its static deflection position, where “up” is the positive direction for y. If the static ...
0
votes
0answers
316 views
Velocity using spring contraction
I'm trying to determine the maximum final velocity of a body with which it contracts a spring until it touches the wall. It happens only with the presence of maximum energy. So, I've taken the kinetic ...
2
votes
0answers
161 views
include the stretch of the spring own weight in potential energy for spring pendulum?
we are given a problem with spring with its own mass $m$. I am confused how to set up the
PE term in the Lagrangian.
Assume the spring has length of $L_{0}$ when it is laying on a table
horizontally. ...
0
votes
1answer
282 views
Two Blocks of mass M1 and M2 are connected by a spring of force constant k [closed]
If Block 1 is elongated towards right to a distance $x_1$ and Block 2 is elongated towards left to a distance of $x_2$ simultaneously, what is the work done by the spring on each of these blocks ...
0
votes
1answer
88 views
Why are there two ways to solve for energy of a spring?
I can find the energy of a spring using $F = -kx$, or by using the formula $e = 1/2mv^2 + 1/2I\omega^2 + mgh + 1/2kx^2$. The first way, I get $mg/k = x$, but the second way, I get $2mg/k = x$. Which ...
0
votes
0answers
182 views
The Gravity Spring [closed]
This problem examines the scenario of a tunnel drilled through the center of the Earth, and the length of time required for an object to fall through the hole and back again.
use trigonometry to ...
2
votes
2answers
204 views
Why do joined massless springs, act like a rope under tension?
In an oscillations exercise there is a spring attached to another spring, attached to a block.
Long story short: I have to find the global $k$.
In the solutions it says:
"Because the springs are ...
-1
votes
1answer
79 views
I think there is a mistake in solutions to this problem. plus and minus sign
!
I pretty much had what the solutions had, but we disagreed with one thing, a minus sensitive sign.
$\sum W = \Delta K$
$\int_0^{-s} - ks^2 ds = \frac{ks^3}{3} = \frac{1}{2}m(v^2-4^2)$
...
0
votes
0answers
72 views
Springs yet again, this time with a picture. Infinite displacement, makes no sense [duplicate]
Possible Duplicate:
How could this damped oscillator ever go to infinity? Or negative infinity for that matter?
Consider this
!
Where I purposely drew the right arrow bigger than the left ...
0
votes
2answers
88 views
The time for which rear moving block remain in contact with spring in the following situation? [closed]
I'm a physics tutor. I'm stuck up with this question. I've no clue about how to proceed with this question. Can any one help?
A 2 Kg block moving with 10 m/s strikes a spring of constant π^2 N/m ...
1
vote
1answer
306 views
Work and Area under a Curve relating to Hooke's Law
If it takes work W to stretch a Hooke’s-law spring (F = kx) a distance d from its unstressed length, determine the extra work required to stretch it an additional distance d (Hint: draw a graph and ...
1
vote
4answers
622 views
17 Joules of Energy From a Mouse Trap
Do you think it would be possible to get 17 joules out of a standard size mouse trap. By my math, it is a torsion coefficient of 3.45 or so out of the spring.
0
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2answers
1k views
Work done by spring over distance
I'm working through a problem involving energy conservation. Unfortunately, I cannot calculate the work done by a spring.
...
4
votes
1answer
514 views
Hooke's Law question
I have the following question to answer:
a force of160 N stretches a spring 0.050m from its equilibrium position.
A. what is the spring constant of the spring?
The equation for Hooke's Law in my ...
0
votes
1answer
336 views
if a force is 1 newton metre, what is it at 2 meters?
If I have a force, say 24 kg/cm what would that equate to at 2cm? I would like to know the formulae for calculating this.
For example. If a motor can hold an object of 24kg at 1cm from its pivot ...
2
votes
0answers
647 views
Measuring the spring constant in a system with hydrostatic buoyancy
I have a physics lab tomorrow and I would appreciate it if you could give me your opinion on whether my reasoning is correct for this situation or not:
http://i.stack.imgur.com/WMzA7.jpg
The title ...
