0 rad s⁻¹
2.0 kg
1 kg
5 kg
Model constants
g = 9.81 N/kg
Rₑ = 6.37 × 10⁶ m
Rotation period
Arrows share one force scale. Dashed red Fc: resultant, offset for clarity.
Current values
Centripetal acceleration
mg
=
Fc
=
N
=
The bars represent actual force magnitude.
Changing mass changes both the numerical force values and the bar lengths.
Fc is the resultant of weight and normal reaction, not an extra force.
Steady rotation states; speed changes omit tangential acceleration. Motion is sped up. Displayed values are rounded.
Changing mass changes both the numerical force values and the bar lengths.
Fc is the resultant of weight and normal reaction, not an extra force.
Steady rotation states; speed changes omit tangential acceleration. Motion is sped up. Displayed values are rounded.
THRESHOLD
Fc = ma =
mg − N
Fc = mω²R
N =
mg − Fc
Live calculation
Beyond Contact
CONTACT LOST · N = 0
ESCAPE VELOCITY
Contact lost · motion paused
Current state
Distance from centre
Object speed
Gravitational acceleration
a = g(Re/r)2
Gravitational force
Fg = ma = mg(Re/r)2
Normal reaction after contact is lost
N = 0
Initial conditions at contact loss
After contact is lost, the normal reaction disappears. Gravity alone curves the path. The dotted line records the object’s trajectory. Scene 3 uses inverse-square gravity. Motion is sped up and the view auto-scales when necessary.