Top of rod has an area of 1 square inch
Pressure is applied to the top of a rod at 1000 Lbs per square inch
The bottom of the rod has an area of 1/8 square inch and is pushing against a steel surface
Through a hole in a steel block which is stuck to the surface. Is the force trying to push the block off the same as the force at the top off the rod?

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Originally Posted by tezzafordot

Is the force trying to push the block off the same as the force at the top off the rod?

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Yes - you apply 1000 pounds at the top of the rod, then the block must resist with 1000 pounds of force - otherwise the rod would move (from ). However, the pressure at the narrow end of the rod will be 8 times greater than the pressure at the fat end (8000 psi at the skinny end and 1000 psi at the fat end).