Consider what happens if the block is suddenly disconnected from the spring, as shown below. Choose the correct equation for calculating the coefficient of kinetic friction (lk) if it takes time t for the block to travel a displacement of Ax down the inclined surface. Note that this displacement is negative in the given rotated coordinate system, and that the acceleration of the block is constant so the motion is described by the four kinematic equations. Hint: remember that Ar = r TO

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Consider a 14.5 kg rectangular block of length 0.40 m attached to a spring with a
spring constant of 30.5 N/m.
The coefficient of static friction between this block and the surface is 0.310.
Transcribed Image Text:Consider a 14.5 kg rectangular block of length 0.40 m attached to a spring with a spring constant of 30.5 N/m. The coefficient of static friction between this block and the surface is 0.310.
Consider what happens if the block is suddenly disconnected from the spring, as
shown below. Choose the correct equation for calculating the coefficient of kinetic
friction (Uk.) if it takes time t for the block to travel a displacement of Ax down
the inclined surface. Note that this displacement is negative in the given rotated
coordinate system, and that the acceleration of the block is constant so the motion is
described by the four kinematic equations. Hint: remember that
Ax = x – x0 -
spring is
disconnected!
Дх
2 Δη
gt cos(0)
+ tan (0)
2 g t² cos(0)
+ tan (0)
Hs = cos (0) + sin (0)
gt?
2 Ax
+ sin (0)
Ar
2 sin (0)
I t?
- sin (0)
2 g t?
Transcribed Image Text:Consider what happens if the block is suddenly disconnected from the spring, as shown below. Choose the correct equation for calculating the coefficient of kinetic friction (Uk.) if it takes time t for the block to travel a displacement of Ax down the inclined surface. Note that this displacement is negative in the given rotated coordinate system, and that the acceleration of the block is constant so the motion is described by the four kinematic equations. Hint: remember that Ax = x – x0 - spring is disconnected! Дх 2 Δη gt cos(0) + tan (0) 2 g t² cos(0) + tan (0) Hs = cos (0) + sin (0) gt? 2 Ax + sin (0) Ar 2 sin (0) I t? - sin (0) 2 g t?
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