/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 9 The California sea lion is capab... [FREE SOLUTION] | 91Ó°ÊÓ

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The California sea lion is capable of making extremely fast, tight turns while swimming underwater. In one study, scientists observed a sea lion making a circular turn with a radius of \(0.35 \mathrm{m}\) while swimming at \(4.2 \mathrm{m} / \mathrm{s}\). a. What is the sea lion's centripetal acceleration, in units of \(g ?\) b. What percentage is this acceleration of that of an \(\mathrm{F}-15\) fighter jet's maximum centripetal acceleration of \(9 g ?\)

Short Answer

Expert verified
a. The sea lion's centripetal acceleration is \(5.14 g\). b. This acceleration is \(57.11 \% \) of an F-15 fighter jet's maximum centripetal acceleration.

Step by step solution

01

Calculate the centripetal acceleration

The formula used to calculate centripetal acceleration (\(a_{c}\)) is \(a_{c} = \frac{v^{2}}{r}\), where \(v\) is the speed and \(r\) is the radius. So, \(a_{c} = \frac{(4.2 \, m/s)^{2}}{0.35 \, m}\) = \(50.4 \, m/s^{2}\). To convert this to units of \(g\), divide this by the acceleration due to gravity (\(9.8 \, m/s^{2}\)): \( \frac{50.4 \, m/s^{2}}{9.8 \, m/s^{2}} = 5.14 g \).
02

Compare sea lion's centripetal acceleration to the F-15 jet's acceleration

According to the problem, the F-15 fighter jet's maximum centripetal acceleration is \(9 g\). To find out what percentage of the jet's acceleration is the sea lion's, divide the sea lion's acceleration by the jet's and multiply by 100: \(\frac{5.14 g}{9 g} \times 100 = 57.11 \% \). This is the sea lion's centripetal acceleration as a percentage of the F-15 fighter jet's maximum centripetal acceleration.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Physics Education
Understanding physics can be fun and engaging, especially when exploring real-world scenarios. The study of centripetal acceleration, as seen with the California sea lion, is a perfect example of this. Physics education helps us comprehend how animals or objects move in a circular path. This turns complex motions into simple, understandable concepts which can be modeled mathematically.

Key concepts in physics education involve not only learning the formulas but also understanding the principles behind them. Here, we use the formula for centripetal acceleration:
  • Centripetal Acceleration Formula: The core formula is \(a_{c} = \frac{v^2}{r}\) where \(v\) is velocity and \(r\) is the radius of the circular path.
  • Conversion to Standard Units: Often, results need to be expressed in units like \(g\), which is the acceleration due to gravity. This conversion helps compare different accelerations in a standardized way.
By learning these fundamentals, students can apply this knowledge to various contexts, enhancing problem-solving skills and fostering a deeper understanding of the physical world.
Circular Motion
The sea lion's movement in a circular path is a great example of circular motion. In physics, when an object moves continuously along a curved path, it is undergoing circular motion, which requires an inward force known as the centripetal force to maintain its path. This force isn't a new type of force but rather a direction-specific manifestation of existing forces such as tension, friction, or gravity.

When we calculate centripetal acceleration, we are essentially determining the acceleration needed to change the direction of the sea lion's velocity as it follows a curve. There are several key aspects to consider:
  • Circular Path Radius: The radius of the path impacts the centripetal acceleration; a smaller radius requires a higher acceleration to maintain motion.
  • Velocity's Impact: The faster an object moves, the greater the centripetal acceleration needed to sustain its circular motion.
Circular motion is applied broadly in physics, from explaining the orbits of planets to the dynamics of vehicles rounding curves. Understanding this concept allows students to grasp why specific centripetal accelerations are necessary for different circular paths.
Kinematics
Kinematics is the branch of physics that deals with the motion of objects, providing descriptive aspects without considering the forces causing the motion. When trying to understand how the sea lion's motion translates into centripetal acceleration, it's important to recognize why kinematics is crucial.

Kinematics examines parameters such as:
  • Displacement and Distance: This pertains to the length of path an object takes and its overall change in position.
  • Velocity and Speed: Velocity is a vector quantity describing speed with direction, crucial in understanding how the sea lion maintains a consistent speed in circular motion.
The kinematic equations and principles allow us to calculate and predict motion characteristics, such as velocity and acceleration, under various conditions. By applying these principles to the sea lion's turning motion, we derive its centripetal acceleration and ultimately gain insight into how such calculations reflect real-world physics events.

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