A flywheel turns through 20 rev as it slows from an angular speed of 9.0 rad/s to a stop.  What is its angular acceleration (magnitude)? 

Spend 10-12 minutes on this question. Your grade on this ‘summary of our semester’ question is based on providing a complete answer, that will be two paragraphs of 5 to 8 sentences for each paragraph, responding to the following scenario and application. The question has you applying theories we’ve covered to a topic related to assessing your personal growth in the course. First, here’s a foundation for our class: Through effort on your part, you should have a new range of knowledge that has a good chance of being useful to you, likely in another class, likely in your career. Part of making it through a class is–for some students, but not all–to see that you may be accustomed to classes that don’t expect much of you. Classes may have minimal assigned work, and minimal work expectations. (Some of you acknowledged this reality in your final Reflections answers.) Other teachers / professors may use a different approach that also works to help you learn. But, the process of learning is why we should be here, and I believe it’s not in your best interest to instead let you ‘bluff your way through.’ I can also see the over-dependence on AI from a lot of you, instead of people making their own effort (yes, it’s obvious). As I have said, you’re just cheating yourself. So from this described environment, some of you have a completely different mindset than I have about what a university class should be. I accept that some students will be upset that they are pushed to work harder than they’re expecting. I have spent my entire life living the adventure of being fully engaged as ‘a media person.’ It doesn’t mean I’m always great at everything I do, but it does mean I always try to be as good as my abilities allow, and to keep learning. I have also had some important mentors. So, from that described context, now apply something you have learned in this class. We used the term hegemony throughout the semester, meaning ‘negotiating a preferred position.’ Here’s our first scenario: some students’ preferred position may be “don’t challenge me to think more deeply, don’t ask much work from me” while my position is “my job is to push you to see your potential, trying to serve as a caring mentor, trying to guide you toward making yourself competitive from your skills and knowledge for when you’re getting into a career. Second scenario:  “Spiral of Silence” means a person who sees themselves as being in the minority against a majority opinion and may choose to stay silent instead of speaking up. Within that model, I choose NOT to stay silent, but to ‘speak up’ by trying to push back against an expectation that a university class should expect very little of you, and in turn provide very little educational growth for you. Now to the writing about these: Your 1st paragraph: say how you agree or disagree by applying hegemony and describing ways it works to the challenge for college students related to any class they may take. Your 2nd discussion paragraph: apply Spiral of Silence to say how you agree or disagree with someone seeing the better potential possible in college students and speaking up and pushing back against a system that doesn’t work to help each person achieve their full potential and describing ways it works to the challenge for college students related to any class they may take.

A disk, initially rotating at 118 rad/s, is slowed down with a constant angular acceleration of magnitude 3.59 rad/s2. How much time does the disk take to stop?

A 4-kg block, attached to a spring, executes simple harmonic motion according to x = 2cos(40t) where x is in meters and t is in seconds. The spring constant of the spring is:

What is the difference between transverse and longitudinal waves?

Throughout the “Better than the Internet” series, speakers like Sarah Blaffer Hrdy, Alison Darcy, and Andy Laats explore what humans uniquely bring to caregiving. Choose one specific caregiving context from the episodes (parenting infants, supporting mental health, guiding children through grief, or another moment you discussed in Perusall).  In 100-150 words, analyze what is irreplaceable about human presence in that context. What biological, emotional, social, or cultural dimensions does the human caregiver address that AI or robots cannot? Use specific developmental concepts we’ve studied in your discussion.

A person pushes a 48.5kg block of ice  at an angle 30.80 below the horizon across a lake as shown in the figure.   Calculate the minimum force F (in N) he must exert to get the block moving. (Hint: Horizontal component of force = Static friction force) (The coefficient of static friction is 0.1 and the coefficient of kinetic friction is 0.03)

A man stands on a platform that is rotating (without friction) with an angular speed of 2.33 rev/s; his arms are outstretched and he holds a brick in each hand. The rotational inertia of the system consisting of the man, bricks, and platform about the central axis is 6.92 kg·m2. If by moving the bricks the man decreases the rotational inertia of the system to 1.96 kg·m2, what is the resulting angular speed in rad/s of the platform?

The only force acting on a 3.8 kg body as it moves along the positive x axis has an x component Fx = -8x N, where x is in meters. The velocity of the body at x = 1.4 m is 9.1 m/s. What is the velocity of the body at x = 4.1 m?

A 0.67 kg ball is moving horizontally with a speed of 4.0 m/s when it strikes a vertical wall. The ball rebounds with a speed of 1.4 m/s. What is the magnitude of the change in linear momentum of the ball?