A Stepladder Consists of Two Halves, Hinged at the Top

question 2

Multiple Choice

A stepladder consists of two halves, hinged at the top, and connected by a tie rod that keeps the two halves from spreading apart. In this particular instance, the two halves are 2.50 m long, the tie rod is connected to the center of each half and is 70.0 cm long. An 800-N person stands 3/5 of the way up the stepladder, as shown in the figure. Neglecting the weight of the ladder, and assuming that the ladder is resting on a smooth floor, what is the tension in the tie rod? Note: To solve this problem you must "cut" the ladder in half and consider the equilibrium of forces and torques acting on each half of the ladder.

• A) 140 N
• B) 240 N
• C) 280 N
• D) 360 N
• E) 560 N

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Definitions:

Clear Majority

A situation or result in which a significantly larger portion of a group supports a particular outcome or opinion over all others combined.

Hypothesis Test

A statistical method that uses sample data to evaluate a hypothesis about the properties of a population.

P-value

The likelihood of achieving test outcomes that are as significant or more so than the observed results, assuming the null hypothesis is true.

Gadd Severity Index

A scoring system used to measure the severity of single or multiple injuries, often used in the context of road traffic accidents.