A small metallic bob is suspended from a light inextensible string to form a simple…
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A small metallic bob is suspended from a light inextensible string to form a simple pendulum. Neglecting air resistance, which physical quantity of the bob–string system remains constant throughout the swing?
(a) Kinetic energy only
(b) Sum of kinetic and potential energies (mechanical energy)
(c) Potential energy only
(d) Angular momentum about the pivot