Question

1. The length of the pendulum is
(a) AB
(b) BC
(c) AC
(d) SB
2. The amplitude of the pendulum is
(a) AB
(b) AC
(c) SA
(d) SB
3. The time taken for 20 oscillations is 52 seconds. The time period of this pendulum is
(a) 5.25
(b) 2.65
(C) 2.05
(d) none of these
​

Answer 1

Answer:

The most common pendulum length in quality clocks, which is always used in grandfather clocks, is the seconds pendulum, about 1 metre (39 inches) long. In mantel clocks, half-second pendulums, 25 cm (9.8 in) long, or shorter, are used.

The amplitude of a pendulum is thus one-half the distance that the bob traverses in moving from one side to the other. ... For a transverse wave, such as the wave on a plucked string, amplitude is measured by the maximum displacement of any point on the string from its position when the string is at rest.

=2•6 seconds.