🕰️ A pendulum on a frictionless arc — K and U trade, E stays flat
Release the bob from an angle. Kinetic energy K and gravitational energy U swap back and forth, but the total mechanical energy E is constant.
Walkthrough
1 / 4
Step 1 — the bob is pulled aside and released.
Length L
6.0
m
Amplitude θ₀
50
°
Mass m
1.5
kg
θ =
50
° · v =
0
m/s
K =
0
J · U =
0
J · E =
0
J
frictionless → E is constant
fastest at the bottom, still at the ends
Animation speed
1.0×
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