Homework: Newton’s Laws

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A jet with mass m = 1.1 × 105 kg jet accelerates down the runway for takeoff at 2 m/s2.

1)What is the net horizontal force on the airplane as it accelerates for takeoff?

2)What is the net vertical force on the airplane as it accelerates for takeoff?

3) Once off the ground, the plane climbs upward for 20 seconds. During this time, the vertical speed increases from zero to 21 m/s, while the horizontal speed increases from 80 m/s to 95 m/s. What is the net horizontal force on the airplane as it climbs upward?
4) What is the net vertical force on the airplane as it climbs upward?
5) After reaching cruising altitude, the plane levels off, keeping the horizontal speed constant, but smoothly reducing the vertical speed to zero, in 13 seconds. What is the net horizontal force on the airplane as it levels off?
6) What is the net vertical force on the airplane as it levels off?

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Public policy and Administration

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  1. Learn How to Manage and Case Analysis

A.. What is both the oldest and newest way to learn how to manage?

B.. Machiavelli Case Study Questions, Do you agree or disagree with Machiavelli?

Discuss the following statement: “Human nature doesn’t change, above all at the top, whether questions of success or survival are paramount and there is little time for the niceties. The serious study of the past provides the raw material for wise decisions today and tomorrow. We are prone to make the same kinds of mistakes our predecessors made, and we must emulate the acts of past heroes.”

  1. A.. Chapter 2 highlights the roles of the three branches of government at all levels. Though the structures may vary, the executive, legislative and judicial roles determine the regulatory guidance and all other aspects of governance. What do you perceive to be the role of legal representatives, their importance or lack thereof, and if administrators should allow them to participate?

B.. Highlight the differences between Federalism from 1789 through the present and the significance of the changes: Chapter 3

  • Dual Federalism (1789 – 1933)
  • Cooperative Federalism (1933 – 1960)
  • Creative Federalism (1960 – 1968)
  • New Federalism (1968 – 1980)
  • The New New Federalism (1980 – 1993)
  • Devolution (1993 – 2016)

3.. A What factors influence perceptions relative to ethics?

As a manager, you will have to explain to employees, bosses, family, friends and the public why you did A rather than B? Although you may not be able to convince everyone that A was the right decision, will you be able to support A in a clear, cogent manner?

4.. A.. Briefly explain the five macro-environmental issues most institutions should address when planning. Also, briefly relate this to events in or near your workplace.

B.. When decision making, what are four of the most significant variables?

During the last six months, which variable did you find most crucial in an employment decision that you had to make?

5.. A.. What is “Fiction of Harmony”?

Question #1: Is a prison to punish the guilty, rehabilitate the unfortunate, or protect society? Is it possible for a prison to accomplish all of the goals listed?

Question #2: For a welfare agency, what is an “adequate standard of living”?

B.. Question #1: Name six dimensions of personality that those responsible for selecting leaders can use to evaluate their behavior.

Question #2: Name three general guidelines that are useful in persuading an employee to be part of the solution rather than part of the problem.

6.. A.. What are the advantages and disadvantages of implementing an existing or new program?

What are the associated costs and benefits?

Will this implementation meet or improve the established objectives?

B. Which laws in the 20th century had the greatest impact on American society?

Which U.S. Supreme Court decisions between 2000 and 2015 had and will have the greatest impact on you as a citizen?

What are the defining human rights issues of the 21st century?

7.. A.. What is the relationship between taxation, essential services and public policy?

Who can best manage and spend the taxpayers money?

B. What are some of the advantages and disadvantages of translating material into data available on computer screens as opposed to informal conversations that used to take place over the telephone or while passing in the hallway?

Sample Solution

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The planar pendulum kinematics

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Problem 1) Consider the planar pendulum kinematics discussed in class, start with position vector 𝑟𝑃/𝑂 resolved in terms of the unit vectors 𝑖 and 𝑗, and verify the expressions obtained for the acceleration and velocity:
𝑎𝑃/𝑂 = (𝐿𝜃̈ cos 𝜃 − 𝐿𝜃̇2 sin 𝜃)𝑖 + (𝐿𝜃̈ sin 𝜃 + 𝐿𝜃̇2 cos 𝜃 )𝑗

Problem 2) Consider the kinematic of the rolling disc considered in class, and verify that the instantaneous acceleration of the point of contact is not zero.

Problem 3) In Figure below, a slide of mass 𝑀𝑟 is located on a bar whose angular displacement in the plane is described by the coordinate 𝜃. The motion of the slide from the pivot point is measured by the coordinate 𝑟1. The acceleration due to gravity acts in a direction normal to the plane of the motion. Assume that the point 𝑂 is fixed in an inertial reference frame and determine the absolute velocity and absolute acceleration of the slide.

Problem 4) Determine the number of degrees of freedom of the systems shown below. Assume that the length L of the pendulum shown in (a) is constant and that the length between each pair of particles in b is constant.
Hint: For c, the rigid body can be thought of as a system of particles where the length between each pair of particles is constant.

Sample Solution

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Human systematic landscape planning and design.

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More Description: Multi-scale investigation is a critical process in human systematic landscape planning and design. However, due to financial cost, project time frame and other limitation faced by a design team, not all landscape project conducts multi-scale investigation. Choose one of the topics and answer the question please.
***Question:
a. Articulate the benefits of multi-scale investigation in landscape architecture practice regardless of the focus scale (where actual change will occur) of a project.
b. What are some of the possible process of multi-scale investigation (e.g., top-down, bottom up, parallel, iteration), choose one or more, describe them using your own language and discuss their strengths and weaknesses.

Sample Solution

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