ED The Science Museum shared this resource with us as a fun way to teach primary students about gravity, balance and weight.
Although an approximate assessment of specific gravity can be obtained by the hefting of a hand specimen of a specific monomineral, an accurate measurement can only be achieved by using a specific gravity balance.
When I examine these children I find there is an often underlying delay in development of the system that allows us to maintain our position in space relative to gravity (balance).
The gravity balancing is verified with an example of a quasi-static motion.
However, the disadvantage of this method is that the joint is complex, big, and heavy because of gravity balance mechanism.
This paper presents gravity balancing designs for two and three links planar chains using non-zero free length springs.
The potential benefit of applying gravity balancing to orthotic, prosthetic and other wearable devices is well recognized, but practical applications have been elusive.
This work presents a new method that is more practical than existing methods to provide approximate gravity balancing of mechanisms to reduce actuator loads.
The authors have already performed the kinematic study and gravity balancing of seven degrees-of-freedom (DOFs) surgeon-side manipulator (Singh et al., 2015a, 2015b).
The gravity balanced two-link planar manipulator design is described and a class of nonlinear gain PD controllers is introduced for the set-point control of manipulator with counter-weights and different payloads.
