# Fundamentals of physical science, assignment help

## Overview

This assignment has two parts. The first part (A) requires that you have reviewed the course notes for this week. The second part (B) requires you to watch some videos and respond to prompts about them.

Part A

You will first need to review the course notes for this week, and optionally attend or watch recordings of the lecture GoTo sessions. For part A, please post at least two well thought out questions that you have over this week’s material. Questions should be based on the course notes or lectures and be related to physical science. These questions can include things you are not sure you understand, concepts you find confusing, or questions that go beyond the scope of this course. Questions that make it apparent you have not reviewed the material, have not been thorough, or show no effort, may receive partial or no credit at your instructor’s discretion. Take advantage of your chance to learn. You do not need to answer them, but these questions are mandatory and 20% of the grade for this activity. I will respond to one or both of your questions in the grade comments section after submission.

Part B

Below you will find links to online videos for you to watch followed by a few prompts. Your response for Part B must be a minimum of 150 words. You can choose to either watch one video and post a response of 150 words on that single video or you may watch more than one video and distribute the 150 words across more prompts. (For example, if you chose to watch two videos, your response could be 75 words each for a total of 150 words.) Each prompt might include several questions, but you do not need to answer each one. Use these questions inside each prompt to guide and inspire your response.

Magnus Effect

The Magnus effect is the appearance a lift force on spinning cylindrical or spherical objects (balls) making them curve away from their expected trajectories. You see the Magnus effect at work in the curved flight path of spinning balls in baseball, tennis, soccer, and Ping-Pong.

Prompt #1: Currently it is against the rules for a baseball player to modify the ball in any way, but if a modification was allowed, how would you modify a baseball to use the Magnus force in your advantage? (Hint: The Magnus force is directly proportional to the linear velocity of the ball, the spinning (or rotational) velocity of the ball and the friction between the surface of the ball and the air (drag coefficient)).

What are some experiences you have had with the Magnus effect?

Prompt #2: The earth is a spherical object which translational (orbital) velocity is approximately equal to 67,000 mph and a rotational speed of 1,040 mph. Do you think there is Magnus force acting on the earth? Explain your answer.

Conservation of Momentum

During a collision between two objects in an isolated system, the total momentum of the system (sum of the momentum of all the objects) is equal to the total momentum of the system after the collision.

Prompt #3: Why can disposing of the urine in outer space disturb the orbital trajectory of the spacecraft? What other changes or factors might affect the trip in some way? Make your best guess on how the mission would be impacted by this change. Explain your reasoning.