frequency, f = 12 /10 = 1.2 Hz
time period
t =1/f = 2 pi sqrt (L/g)
1 / 1.2 = 2 * 3.14 sqrt (L/9.8)
L = 0.17256 m
for angle
cos x = (L-h) / L
cos 8 * 0.17256 = 0.17256 - h
h = 1.68* 10^-3
a) x = A cos (2 pi f t)
x = 0.168 cos ( 2 pi * 1.2* t)
x = 0.168 cos ( 7.536 t)
=====
b)
L = 0.17256 m
=====
Comment before rate in case any doubt, will reply for sure.. goodluck
A 142 g ball is tied to a string. It is pulled to an angle of 4.0 ∘ and released to swing as a pendulum. A student with a stopwatch finds that 12 oscillations take 13 s . How long is the string?
A 163 g ball is tied to a string. It is pulled to an angle of 7.8 ∘and released to swing as a pendulum. A student with a stopwatch finds that 30 oscillations take 17 s . How long is the string?
A 258 g ball is tied to a string. It is pulled to an angle of 7.0 ∘and released to swing as a pendulum. A student with a stopwatch finds that 13 oscillations take 11 s . How long is the string?
A 321 g ball is tied to a string. It is pulled to an angle of 5.20 ∘ and released to swing as a pendulum. A student with a stopwatch finds that 16 oscillations take 16.5 s . How long is the string?
A 155 g ball is tied to a string. It is pulled to an angle of 7.80 ∘ and released to swing as a pendulum. A student with a stopwatch finds that 10 oscillations take 11.0 s . How long is the string?
A 211 g ball is tied to a string. It is pulled to an angle of 6.4 ∘ and released to swing as a pendulum. A student with a stopwatch finds that 15 oscillations take 15 s . How long is the string?
A 317 g ball is tied to a string. It is pulled to an angle of 6.80 degrees and released to swing as a pendulum. A student with a stopwatch finds that 16 oscillations take 18.5 s. How long is the string?
A 197g ball is tied to a string. It is pulled to an angle of 8.0? and released to swing as a pendulum. A student with a stopwatch finds that 21 oscillations take 11s . How long is the string?
A 128 g ball is tied to a string. It is pulled to an angle of 3.60 degrees and released to swing as a pendulum. A student with a stopwatch finds that 17 oscillations take 15.5 s .Part AHow long is the string?
6 A 331 g ball is tied to a string. It is pulled to an angle of 4.4 degrees and released to swing as a pendulum. A student with a stopwatch finds that 16 oscillations take 13 s. How long is the string?