Find the energy equation for the system shown in the figure. “m” – McqOptions

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1.	Find the energy equation for the system shown in the figure. “m” is the mass of the block moving at a velocity “v”, “k” is the spring constant, “q” is the coefficient of friction of the floor and let “d” be the compression in the spring.
A.	1/2mv2+ = 1/2kd2 + qmg*d
B.	1/2mv2+ + 1/2kd2 + qmg*d = 0
C.	-1/2mv2+ = 1/2kd2 + qmg*d
D.	1/2mv2+ – 1/2kd2 + qmg*d = 0
Answer» B. 1/2mv2+ + 1/2kd2 + qmg*d = 0

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