What Does a Spring Scale Read at Peak When Jumped On?

In summary, the conversation discusses using a bathroom scale to measure weight and determining the value of the spring constant, with the conclusion being to use the equation KE + PE = constant.
  • #1
fender5791
8
0
If you stand on a bathroom scale, the spring inside the scale compresses 0.50 mm, and it tells you your weight is 740 N. Now if you jump on the scale from a height of 1.2 m, what does the scale read at its peak?


I'm guessing you use 1/2kx^2 but otherwise, I'm not sure.
 
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  • #2
Welcome to PF!

Hi fender5791! Welcome to PF! :smile:

(try using the X2 tag just above the Reply box :wink:)
fender5791 said:
If you stand on a bathroom scale, the spring inside the scale compresses 0.50 mm, and it tells you your weight is 740 N.

ok, so what is the value of k? :smile:

(and yes, you can use 1/2 kx2 later)
 
  • #3
So would k be (740N)/(.0005m) = 1.48x10^6 N/m?
 
  • #4
Yup! :biggrin:

Now use KE + PE = constant.​
 
  • #5
Got it, thanks.
 

1. What is a spring scale and how does it work?

A spring scale is a type of mechanical weighing instrument that measures the weight or force exerted on an object. It works by using a coiled spring that stretches when a force is applied to it, and the amount of stretch is proportional to the force applied.

2. How is a spring scale different from other types of scales?

Unlike other scales that use gravity or air pressure to measure weight, a spring scale measures weight by using the principle of Hooke's Law, which states that the force applied to a spring is directly proportional to the amount of stretch or compression of the spring.

3. Why is a spring scale often used in scientific experiments?

A spring scale is commonly used in scientific experiments because it provides precise and accurate measurements of weight or force. It can also measure small forces, making it suitable for experiments that require sensitive measurements.

4. How does a spring scale read at peak when jumped on?

When a person jumps on a spring scale, their weight or force causes the spring to stretch to its maximum point. The scale then reads the weight or force at that peak point, giving an accurate measurement of the force exerted by the person's jump.

5. Are there any limitations to using a spring scale?

While a spring scale is a useful tool for measuring weight and force, it does have some limitations. It can only measure weight up to its maximum capacity, and it may not provide accurate measurements if the object being weighed is not placed directly on the scale's hook.

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