Pendulum: Gravity and Other Forces
Most recent answer: 05/08/2018
- Rajesh P (age 16)
The key is the "normal" force from th earth on the stand of the pendulum. Because the nromal force is just big enough to kep the stand from accelerating into the earth depsite gravity, its magnitude is set by the gravitational force on the pendulum.
That normal force isn't there in space. If you were to put the pendulum on an accelerating rocket that exerted the same force on the stand, the pendulum would behave just like it does on earth.
(published on 05/08/2018)