Solve the Problem $R$ , When Designing a Road Is $\mathrm { R } = \frac { \mathrm { V } ^ { 2 } } { \mathrm {~g} ( \mathrm { f } + \tan \alpha ) }$

question 187

Multiple Choice

Solve the problem.
-A formula used by an engineer to determine the safe radius of a curve, $R$ , when designing a road is:
$\mathrm { R } = \frac { \mathrm { V } ^ { 2 } } { \mathrm {~g} ( \mathrm { f } + \tan \alpha ) }$ , where $\alpha$ is the superelevation of the road and $\mathrm { V }$ is the velocity (in feet per second) for which the curve is designed. If $\mathrm { V } = 81 \mathrm { ft }$ per sec, $\mathrm { f } = 0.1 , \mathrm {~g} = 30$ , and $\alpha = 1.1 ^ { \circ }$ , find $\mathrm { R }$ . Round to the nearest foot.

• A) \(R = 1832 \mathrm { ft }\)
• B) \(R = 1845 \mathrm { ft }\)
• C) \(R = 1838 \mathrm { ft }\)
• D) \(\mathrm { R } = 1835 \mathrm { ft }\)

Acknowledge the effectiveness and different types of psychotherapies through meta-analyses and research reviews.

Understand treatment options for specific disorders such as phobias, ADHD, and schizophrenia.

Comprehend the methods used in selecting and evaluating the effectiveness of treatments for psychological disorders.

Explore the role of technology in delivering psychological treatments.

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