2 paragrapgh each and separte response.
1. “Appropriate Standards”
2. “Writing System and User Requirements” Please respond to the following:
3. “Chapters 2 and 3”
Refer to the section marked “Discussion Questions (Evaluation)” at the back of each of the assigned chapters (Chapters 2 & 3):
Chapter 2. #101. Consider a ball at rest in the middle of a toy wagon. When the wagon is pulled forward, the ball rolls against the back of the wagon. A friend asks what force pushes the ball to the back of the wagon. Interpret this observation in terms of Newton’s first law.
Answer: I’d tell my friend that there is no force applied to the ball. This phenomenon is actually due to the inertia of the ball. Initially, the wagon and the ball are both stationary relative to the ground. In order to get the wagon moving along the ground, a force must be applied to it. The force applied to the wagon but not to the ball. Consistent with Newton’s law of inertia, the ball remains stationary relative to the ground. With the wagon moving forward relative to the ground, but the ball remaining stationary relative to the ground, the position of the ball in the wagon shifts to the back.
Chapter 3: Consider a bob attached by a string a simple simple pendulum that swings to and fro. (a) Why does the tension force in the string not do work on the pendulum? (b) Explain, however, why the force due to gravity on the pendulum at nearly every point does do work on the pendulum. (c) Where is the single position of the pendulum where “no work by gravity” occurs?
Example Reply to a Fellow Student
In your explanation, the frame of reference is the ground. Why do you have to relate everything to the ground?
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