The object of interest is drawn as the dot because the object is what is being acted upon.
2. How do you know how long to draw the arrows attached to the dot?
You know how long to draw the arrows attached to the dot by how much force is being pushed upon the crate. The two forces, the force of the floor on the earth and floor on the crate should be equal.
3. Why is there no arrow labelled F(man on crate) in the force diagram in the video?
The man is not creating an exerting force on the crate, the earth is.
4. In general, what can you tell about the object of interest by examining a complete force diagram?
The crate is at equilibrium at a vertical standpoint however, horizontally the crate is being forced in a direction.
5. In general, what can you NOT tell about the object of interest by examining a complete force diagram?
Whether the object of interest's velocity when moving will accelerate or not.
6. What do you know (and what do you NOT know) about the MOTION of the object shown in the force diagram below?
What is known about the motion of object is that it is not moving vertically because there are two forces that are equal. What is also known is about the motion of this object is that it is moving in a direction (right) because there is only one force acting upon it. What is not known about the motion of the object is the velocity of it's motion.
You need to continue this journal entry in order to demonstrate your acheivement of the lesson's learning goals. Make a NEW POST on your blog with the same title and address the comments below. You must post your response within 24 hours.
ReplyDeleteYou are working on Journal 11/20
You are working on Journal 11/20
Good job answering the questions about the video, your responses show that you understand the most important lessons about making a force diagram. This will be very helpful for you in the lessons to come.
Your answer to question 6 does not yet show that you understand the big lesson of last week. Consider the force diagram carefully and address the following questions:
6A. Explain why you don't know whether the ball is moving in the +x or -x direction, or not moving at all.
6B. Explain what would be happening to the motion of this ball if it were moving in the +x direction, with forces exerted on it by other objects as shown.
6C. Explain what would be happening to the motion of this ball if it were NOT moving yet, with forces exerted on it by other objects as shown.
6D. Explain what would be happening to the motion of this ball if it were moving in the -x direction with forces exerted on it by other objects as shown.
6E. Explain the relationship between the direction of the total force exerted on the object of interest and what is happening to the motion of the object of interest.
Grade = 2/4 Not complete yet. Follow instructions to complete the assignment and earn full credit. Your revisions must be completed before the next journal is due or else a late penalty will be imposed.
Continue your work in a NEW POST with the same title within 24 hours.