Question #1d83d

1 Answer
Sep 24, 2015

Answer:

#0.23"s"#

Explanation:

The displacement is given by:

#x=Acos(2pift)#

#A# = amplitude

#f# = frequency = #1/T#

#x=Acos((2pit)/(T))#

#3=8cos((2pit)/(1.2))#

#cos(1.66pit)=3/8=0.375#

#1.66pit=68^@=(2pi68)/(360)"rad"#

#t=(2xx68)/(360xx1.66)=0.23"s"#