# How will a string or pendulum behave at the top of a circular motion?

I am reading about circular motion and centripetal force. I can visualise why a person sitting in the cart will not fall at the top of a circular loop-the-loop at minimum velocity $$v=\sqrt{gr}$$.

Questions

However, I read that at the top of the loop, the passenger’s hair should not be hanging downwards. Instead it should be hanging upwards. Why is this so?

Additionally, if the above is true, does it mean if I were holding a string or a pendulum at the bottom of the loop, and as the cart moves to the top of the loop, the string or pendulum will actually be hanging “upwards defying gravitational pull” rather than downwards pointing towards the ground?

• If centrifugal force pushes you towards the seat why do you think it will not do the same for your hair or a string? Jun 6, 2021 at 20:22
• Hello Adrian. Thank you for your response. However, isn’t centrifugal force not an actual force? Jun 7, 2021 at 11:41
• It is called a pseudo force or fictional force because it describes a set of inertial properties rather than a direct action of its own force. But it describes a real action that cannot be ignored. Jun 7, 2021 at 14:00