A mechanism (13) for regulating a speed of a cart (10) wheel (14), the mechanism (13) comprising: a rotating backing plate (26) affixed to the wheel (14), thereby rotating along with the wheel (14) a stationary drum (22) affixed to the cart (10) one or more brake shoes (30) attached to the rotating backing plate (26) such that upon rotating the wheel (14), the brake shoes (30) apply centrifugal force on the drum (22), thereby braking the rotation of the wheel (14) proportionally to the speed of rotation of the wheel (14) and a spring module (33) for applying a pulling force on the brake shoes (30) to draw the brake shoes (30) away from the drum (22), wherein the spring module comprise a spring lever for adjusting the preset speed of the wheel thereby allowing resembling the moving characteristics of the cart, providing stable movement of the cart.
