Question

(b) A pendulum completes 20 oscillations in 50s. (i) What is its time period? (b) If
g=9.8ms ?, find its length.
3+2 = 5​

Answer 1

Explanation:

2 oscillations in 5 s hence 1 oscillation in 2.5 s which is its time period

T=2π

g

l

2.5=2π

g

l

l=10×

4π

2

6.25

=1.58m

Answer 2

Answer:

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