The Amount of Time It Takes for a Pendulum to Swing

question 15

Multiple Choice

The amount of time it takes for a pendulum to swing "to-and-fro" through one complete cycle is called the "period" and is calculated using the following equation: $T = 2 \pi \sqrt { \frac { L } { g } }$ where $T =$ period in seconds
$L =$ length of pendulum
$g =$ gravitational acceleration, $9.8 \mathrm {~m} / \mathrm { s } ^ { 2 }$ What is the appropriate unit for L if the preceding equation is to be homogeneous in units?

• A) meters
• B) liters
• C) \(\mathrm { m } / \mathrm { s } ^ { 2 }\)
• D) seconds

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