Question

What force causes the periodic motion of a pendulum?

O
A. Gravity
O
O
O
B. Elastic force
C. Nuclear force
D. Electric force

Answer 1

the answer of this question is option A because,

Pendulum. If you swing a weight on a string, it will go back and forth in regularperiodic motion. ... The force of gravitycauses the pendulum bob to change directions, while the force from the string moves it in a semi-circular motion

Answer 2

the Answer is A

Step-by-step explanation:

because the swinging motion of a pendulum is due to the force of gravity generated by the earth's size