Calculate Spring Constant and Force for Compression

AI Thread Summary
To calculate the spring constant, use the formula for elastic potential energy, E = (1/2)kx², where E is 25J and x is 0.075m. Rearranging the equation allows for the determination of the spring constant k. For the force required to compress the spring, apply Hooke's Law, F = kx, using the spring constant obtained in the first part. This approach provides a clear method to find both the spring constant and the force for compression. Understanding these calculations is essential for applications involving springs in physics.
NewJersey
Messages
35
Reaction score
0
A spring constant stores 25J of energy when compressed by 7.5cm
a) Find the spring constant
b) Find the force to compress the distance
 
Physics news on Phys.org
For part (a), you'll need to know the equations to find the spring constant based off of the energy [E] that is exerted to move it the distance [x] it moves, which is also equal to its amplitude [A].

For (b), the force exerted can be found by using the spring constant value you found in (a) and muliplying it by the distance it is compressed.
F_{x} = - kx
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
Thread 'Voltmeter readings for this circuit with switches'
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
Back
Top