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Initial revision

//****************************
/LET prob_val=1
//HIN No hint unless this line is uncommented and modified
//EXP No explanation unless this line is uncommented and modified
/IMP "../Tools/Problem#"
A mass M = 0.16 /DIS(kg_u) is on a smooth horizontal surface (negligiable friction). It is attached to a spring with spring constant k = 15.3 /DIS(NPm_u). The mass is displaced from its equilibrium position (x=0) by a distance of 0.14 m (x= + 0.14 m) and then released from rest. (Give all of the correct answers, i.e., A or BC or ABC. . .)
//----------------------------
/LET s1a="The motion of M is simple harmonic motion."
/LET mix1=random(1,1,1)
/LET a1a=1
//
/LET s2a="The amplitude varies with time."
/LET s2b="The amplitude doesn't vary with time."
/LET mix2=random(1,2,1)
/LET a2a=2
/LET a2b=1
//
/LET s3a="The frequency of oscillation is independant of k."
/LET s3b="The period of oscillation is independant of k."
/LET s3c="The frequency of oscillation depends on k."
/LET mix3=random(1,3,1)
/LET a3a=2
/LET a3b=2
/LET a3c=1
//
//Nof5aux follows
/LET s1=choose(mix1,s1a)
/LET a1=choose(mix1,a1a)
/LET s2=choose(mix2,s2a,s2b)
/LET a2=choose(mix2,a2a,a2b)
/LET s3=choose(mix3,s3a,s3b,s3c)
/LET a3=choose(mix3,a3a,a3b,a3c)
/LET seed=random(1,300,1)
/MAP(seed;M1,M2,M3;s1,s2,s3)
/LET it=tex("\item[] ","")
/DIS(tex("\begin{choicelist}",""))
/DIS(it) A) /DIS (M1)
/DIS(it) B) /DIS (M2)
/DIS(it) C) /DIS (M3)
/DIS(tex("\end{choicelist}",""))
/MAP(seed;b1,b2,b3;a1,a2,a3)
/LET NM1=b1*(b1==1)+1
/LET NM2=b2*(b2==1)+1
/LET NM3=b3*(b3==1)+1
/LET lett1=choose(NM1,"","A")
/LET lett2=choose(NM2,"","B")
/LET lett3=choose(NM3,"","C")
/LET Nof5right=lett1+lett2+lett3
//**************************
/DIS(stdline)
/ANS(Nof5right,wgt=prob_val,str=mc)
//**************************