1. A pendulum swings back and forth a total distance of 25 cm. In 15 s, it will complete a total of eight full swings.
a) Calculate its frequency.
b) Calculate its period.
c) State the type of vibration the pendulum produces.
d) Calculate its amplitude

STEPS PLEASE

Explanation:

a) Frequency is cycles per second.

f = 8 cycles / 15 s

f = 0.533 Hz

b) Period is the inverse of frequency.

T = 1/f

T = 1.88 s

c) A pendulum is an example of simple harmonic motion.

d) There are 4 amplitudes in one full swing.  So 8 full swings is 32 amplitudes.  The distance per amplitude is:

A = 25 cm / 32

A = 0.781 cm

he made 11 calls in one day