T = mv²/R
T — string tension (inward)
v — speed (tangential)
gravity ⊥ to plane — irrelevant
top-down view — overhead
T (string tension)
— N
T = mv²/R
0— N max
● circular motion sustained
T = mv²/R— N
a = v²/R— m/s²
period = 2πR/v— s
f = 1/T— Hz
double v effect
T at 2v— N (×4)
T at ½v— N (×¼)
top-down view (looking down)
gravity points into the screen
T = only inward force
double v → T×4 (v² effect)