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! Ax 2 Az gt² cos(8) + tan (0) O puk Ar 2 gt² cos(0) + tan (0) Hk = cos (0) + sin (0) Az gt² Hk = 24 + sin (0) gt² O pk A - 2 sin (0) gt²

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! Ax 2 Az gt² cos(8) + tan (0) O puk Ar 2 gt² cos(0) + tan (0) Hk = cos (0) + sin (0) Az gt² Hk = 24 + sin (0) gt² O pk A - 2 sin (0) gt²

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.

Question

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 – xo -
spring is
disconnected!
Ax
2 Δη
gt2 cos(8)
+ tan (0)
%3D
Ar
2 gt² cos(8)
+ tan (0)
Hk = cos (0) + sin (0) 4
gt?
2 Δη
+ sin (0)
Aa - 2 sin (0)
O uk
sin (0)
|
2 gt2

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