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mujadeo
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stretched spring --find coeff of friction
A relaxed spring with spring constant k = 70 N/m is stretched a distance di = 66 cm and held there. A block of mass M = 10 kg is attached to the spring. The spring is then released from rest and contracts, dragging the block across a rough horizontal floor until it stops without passing through the relaxed position, at which point the spring is stretched by an amount df = di/7
7What is the coefficient of kinetic friction µk between the block and the floor?
This problem is a problem for me.
i know about spring constants and friction but can't visualize where to start?
I know:
M= 10kg
df = .094m
Fs = .09 * 70 = 6.3N
N = 9.8*10= 98N
dont know
µk (µk = Fk/N)
Also i know (obviously) that block stops because µk force must be greater than the spring constant force.
thanks for any help
Homework Statement
A relaxed spring with spring constant k = 70 N/m is stretched a distance di = 66 cm and held there. A block of mass M = 10 kg is attached to the spring. The spring is then released from rest and contracts, dragging the block across a rough horizontal floor until it stops without passing through the relaxed position, at which point the spring is stretched by an amount df = di/7
Homework Equations
7What is the coefficient of kinetic friction µk between the block and the floor?
The Attempt at a Solution
This problem is a problem for me.
i know about spring constants and friction but can't visualize where to start?
I know:
M= 10kg
df = .094m
Fs = .09 * 70 = 6.3N
N = 9.8*10= 98N
dont know
µk (µk = Fk/N)
Also i know (obviously) that block stops because µk force must be greater than the spring constant force.
thanks for any help