Soalan # 3aa50

Soalan # 3aa50
Anonim

Jawapan:

# l = 981 "cm" #

Penjelasan:

Tempoh ayunan pendulum sederhana diperoleh daripada formula: # T = 2 * pi * sqrt (l / g) #

Dan sejak # T = 1 / f #

Kita boleh menulis # 1 / f = 2 * pi * sqrt (l / g) #

# => (1 / f) ^ 2 = (2 * pi * sqrt (l / g)) ^ 2 #

# => (1 / f ^ 2) = 4 * pi ^ 2 * l / g #

# => l = (g / f ^ 2) / (4 * pi ^ 2) = ((981 "cm s" ^ - 2) / (1 "s" ^ - 1) ^ 2) ^ 2) = warna (biru) (24.851 "cm") #