Explain how a wedge changes an input force

It is the ratio of the output force to the input force. A wedge applies more force to the object than the user applies to the wedge, so the mechanical advantage of a wedge is greater than 1. A longer, thinner wedge has a greater mechanical advantage than shorter, wider wedge.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

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