A Rock Is Dropped from a Building That Is 121

question 60

Multiple Choice

A rock is dropped from a building that is 121 feet high. The rock s height h in feet after t seconds is given by the equation . At what time is the rock at a height of 75 feet? Round the answer to two decimal places.

• A) 2.88 sec
• B) 1.70 sec
• C) 2.75 sec

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Definitions:

Set-point Control

A control system method where a device adjusts its operation to maintain a process variable at a desired set-point or value.

Open Loop Control

A control system where the control action is independent of the output, lacking feedback from the process being controlled.

FLL Instruction

An instruction in PLC programming that fills a block of data with a specified value.

Zero Data

Refers to a state or condition where no relevant or actionable data is available or present.