EASY PROBLEM - Force to break the string.

In summary, the problem involves finding the force needed to break a string while a toy whistle of 0.208 kg is whirled in a horizontal circle with a radius of 1.00 m at a maximum rate of 3.00 rev/s. The correct approach is to use the formula f=mv^2/r, where v is the velocity. To find the velocity, it is necessary to convert revolutions to distance, with 1 revolution equaling 2pi. Using this information, the final calculation should be 0.208 x (2pi x 3)^2 / 1, which results in a force of 73.9 N.
  • #1
8parks11
63
0
A .208-kg toy whistle can be whirled in a horizontal circle of 1.00 m radius at a maximum of 3.00 rev/s b4 the string breaks. What is the force needed to break the string.

I don't know how to start this problem but this is what i got.

first i found frequency which is 1/3
and then i got omega = 2pi 1/3

i think this is all wrong because the answer is 73.9N

someone please help!
 
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  • #2
ook i read the problem wrong so it should be
f=mac
and then f=mv^2/r
so iget 0.208 x v^2 / 1
now how do i get v from the maximum revolution
 
  • #3
ok i got one revolution is 2pi (obviously)
how do i implement that tothe problem to solve it.
 
  • #4
If 1 rotation is 2pi, how far does it travel in 1 second? This is the velocity.
 
  • #5
ok now i got everything I am screwing up with this ti-89
i did 6pi^2 which obviously registered as pi^2 x 6
thanks
 
Last edited:
  • #6
ok now i got everything I am screwing up with this ti-89
i did 6pi^2 which obviously registered as pi^2 x 6
thanks
 

Related to EASY PROBLEM - Force to break the string.

What is the "easy problem" of force to break the string?

The "easy problem" of force to break the string refers to the basic concept of determining the amount of force needed to break a string. This can vary depending on factors such as the material, thickness, and length of the string.

How is force measured when breaking a string?

Force is typically measured in units of Newtons (N) when breaking a string. This can be done using a force gauge or by calculating the amount of force needed to break the string based on its material properties.

What factors affect the amount of force needed to break a string?

The amount of force needed to break a string can be influenced by various factors, including the type of material the string is made of, its thickness, length, and any external conditions such as temperature or humidity.

Can different types of string require different amounts of force to break?

Yes, different types of string can require different amounts of force to break. For example, a rubber band may require less force to break compared to a steel cable of the same thickness and length.

Is the force needed to break a string always constant?

No, the force needed to break a string may not always be constant. It can vary depending on factors such as the age and condition of the string, as well as any external factors that may affect its strength.

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