Applied Mechanics and Graphic Statics
Minimum pull in a suspended cable with supports at two ends is equal to

Resultant of horizontal thrust and support reaction
Half the weight of the cable
Horizontal thrust
Support reactions

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Applied Mechanics and Graphic Statics
The characteristic of a couple is:

All listed here
Algebraic sum of forces, constituting a couple is zero
A couple can be never the balanced by a single force
Algebraic sum of moments of forces, constituting a couple, about any point, is same

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Applied Mechanics and Graphic Statics
The phenomenon of collision of two elastic bodies takes place because bodies

Attempt to regain its original shape due to their elasticities
Immediately after collision come momentarily to rest
Tend to compress each other till they are compressed maximum possible
All listed here

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