Pendulum length and period
A pendulum's length is increased to four times its original value. By what factor does its period change?
Answer C: explanation for every choice
A
This assumes the period is proportional to length.
B
This assumes the period is proportional to length squared.
C
Correct. T ∝ √L, so √4 = 2.
D
The period increases with length.
TakeawayT ∝ √L.
Equation usedPendulum period
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