How do different physical forces work together to make shoelaces come untied?

Question

(1 point)
Gravity pulls on shoelace ends equally during walking
Static friction prevents knot from becoming unstable
Knot tightness remains constant with continuous movement
• Repeated foot movement creates bouncing that loosens knot tension

Answer 1

The correct explanation for how different physical forces work together to make shoelaces come untied is:

Repeated foot movement creates bouncing that loosens knot tension.

When walking or running, the continuous movement of the foot can cause the shoelaces to bounce and sway, which can gradually loosen the tension in the knot. This reduced tension, combined with the effects of gravity and potential friction, can ultimately lead to the shoelaces coming untied.