A spring of force constant 300 N m-1 is cut in half. The two halves are then placed in parallel

with each other. A force of 6.0 N is then applied to this parallel arrangement.

What is the extension of each spring?

A 0.5 cm

B 1.0 cm

C 2.0 cm

D 4.0 cm

How is it A, i keep getting B using F=2kx?

with each other. A force of 6.0 N is then applied to this parallel arrangement.

What is the extension of each spring?

A 0.5 cm

B 1.0 cm

C 2.0 cm

D 4.0 cm

How is it A, i keep getting B using F=2kx?

so k is proportional to 1/L

so if L halves, k doubles = 600N m-1

since it is in parallel you have to add the spring constants, so k= 1200N m-1

f=kx

you get x as 0.5cm

so if L halves, k doubles = 600N m-1

since it is in parallel you have to add the spring constants, so k= 1200N m-1

f=kx

you get x as 0.5cm

Original post by mosaurlodon

so k is proportional to 1/L

so if L halves, k doubles = 600N m-1

since it is in parallel you have to add the spring constants, so k= 1200N m-1

f=kx

you get x as 0.5cm

so if L halves, k doubles = 600N m-1

since it is in parallel you have to add the spring constants, so k= 1200N m-1

f=kx

you get x as 0.5cm

Thanks, could you help me with another q pls,

* A resistance wire is coiled around a thermistor. The coil of wire will warm the thermistor. It is suggested that the relationship between the power P dissipated in the coiled wire and the stable resistance R of the thermistor is given by the expression P = kRn, where k and n are constants. Describe how an experiment can be conducted to assess the validity of this expression and how the data collected can be analysed to determine k and n. Use the space below for a circuit diagram.

How would i draw the diagram?

https://www.youtube.com/watch?v=TDU_i7xe288

Q18, around 14:20

Q18, around 14:20

Original post by mosaurlodon

https://www.youtube.com/watch?v=TDU_i7xe288

Q18, around 14:20

Q18, around 14:20

No he drew it wrong, i don't think you need two circuits.

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