Find the scalar tangential and normal components of acceleration of a particle with position vector 
Definitions:
Contracted
Engaged by agreement or compact; often refers to muscles shortening during contraction or to formal agreements between parties.
Skeletal Muscles
The muscles attached to bones that are responsible for voluntary movements of the body.
Joints
Structures that connect two or more bones in the body, facilitating movement and providing support.
Origin
Refers to the point or place where something begins, arises, or is derived.
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