Physics

The effective length of a simple pendulum is the sum of the following three: length of string, radius of bob, and length of hook.
In a simple pendulum experiment, the length of the string, as measured by a meter scale, is $$92.0$$cm. The radius of the bob combined with the length of the hook, as measured by a vernier callipers, is $$2.15$$cm. The effective length of the pendulum is


ANSWER

$$94.2$$cm


SOLUTION
Length of the string$$=92.0㎝$$
Radius of bob+length of hook$$=2.15㎝$$
Total length$$=\left( 92.0+2.15 \right) ㎝$$
$$=94.15㎝$$
Rounding off to first decimal place$$=94.2㎝$$
Hence, effective length$$=94.2㎝$$
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