RT: The mesmerizing beauty of physics (gravity vs force tension) in pendulum motion https://t.co/tXmi7eqv2H
RT:钟摆运动中令人着迷的物理学之美(重力与力张力)https://t.co/tXmi7eqv2H
RT: The mesmerizing beauty of physics (gravity vs force tension) in pendulum motion https://t.co/tXmi7eqv2H
RT:钟摆运动中令人着迷的物理学之美(重力与力张力)https://t.co/tXmi7eqv2H