Answer:
Answer:
d)the time it takes for the bob to swing back and forth once
Step-by-step explanation:
Time period of any object is defined as the time after which it can complete its one round of repetitive motion
So here in the back and forth motion of simple pendulum we know that it will move to and fro about its mean position and the total time to make its to and from motion is known as its time period
so here correct answer would be
d) the time it takes for the bob to swing back and forth once
for simple pendulum the formula of time period is given as
T = 2\pi \sqrt{\frac{L}{g}}T=2πgL
here we know
L = length of pendulum
g = acceleration due to gravity