- #1
nysnacc
- 184
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Homework Statement
Homework Equations
rXF ??
The Attempt at a Solution
T= 6 N (r =1)
T = 12 N (r=2)
Simon Bridge said:So far so good - do you have a question?
Please describe how you are thinking about the problem ... given the initial condition, what do you think will happen?
Why is it important that the string is elastic (how would you model the string?)
Conserving mechanical energy is a good starting point and gives you one equation. You need to find two quantities so you need a second equation. What else is conserved? Hint: The force on the mass is along the radius.andrevdh said:Energy is stored in the elastic as it is stretched, thankfully it obeys Hooke's law!
mv^2/r is the centripetal force needed to keep the disk in circular motion... what could be providing the centripetal force, and does it provide that much?nysnacc said:I mean what does those contribute to the finding of v?
Can I just use F= m V2 / r which i put F = T at 0.25m, and r = 0.25m ... so that V is the Vtheta??
A rotating disk is a flat, circular object that is used in experiments to measure the velocity of a moving object. It works by attaching a marker to the disk and tracking its movement as the disk rotates, which can then be used to calculate the radial and transverse velocity of the object being studied.
Radial velocity is the component of an object's velocity that is directed towards or away from a fixed point, usually the center of the rotating disk. It is calculated by measuring the distance between the object and the center of rotation at different points in time, and then dividing by the time interval.
Transverse velocity is the component of an object's velocity that is perpendicular to the radial velocity. In other words, it is the velocity that is directed tangent to the circular path of the object's motion. It is calculated by measuring the distance between the object and the center of rotation at different points in time, and then dividing by the time interval.
Yes, a rotating disk can be used to find the velocity of any moving object as long as the object's movement can be tracked and measured accurately. This method is commonly used in experiments involving rotating machinery, fluid mechanics, and celestial objects.
One limitation of using a rotating disk is that it assumes the object being studied is moving in a circular path. Additionally, the accuracy of the results may be affected by factors such as the speed of rotation, the precision of measurements, and external forces acting on the object. It is important to carefully consider these factors when using a rotating disk to find velocity.