If a steel cable holding a cable car has stress xkpa. If four more cables are attached to the car,what is the stress on each cable?1) x/4. 2)x/5 3)x/3

1 Answer
MetaPhysik
Aug 3, 2018

#x/5#

Explanation:

The stress by definition is force/area. The force acting on the sole cable is weight of the car. Adding 4 more cables, meaning the total cross-section area holding the car is 5 times more.

Original stress on a cable
# S_0= F/A = x #

With 5 cables, each cable's stress is:
#S = F/(5A) = 1/5(F/A) = 1/5x #

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