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r = a/b = 2/3
Jarak tempuh sampai bola berhenti
Jarak lintasan
= (a + b) / |a - b| x h
= (2 + 3) / 1 x 72
= 5 x 72
= 360 cm
r= 2/3
U₁= a.r= 72(2/3)= 48 ⇒ untuk pantulan pertama
S= a/(1-r)
S= a+(2U₁/(1-r))
= 72+(2(48)/1-2/3)
= 72+(96 / 1/3)
= 72+(96.3)
= 72+288
= 360 cm⇒ 3,6 m