How Does Free Fall Affect a Ball's Motion and Vector Math?

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SUMMARY

The discussion focuses on the principles of free fall and vector math as they pertain to the motion of a ball. Key points include that a ball in free fall experiences constant acceleration both upward and downward, specifically due to gravity. The correct answers to the posed questions are that the ball has constant acceleration while moving downward (III only) and that objects in free fall move faster and faster as they descend. Additionally, multiplying or dividing vectors by scalars results in vectors if multiplied and scalars if divided.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Basic knowledge of vector mathematics
  • Familiarity with concepts of acceleration and gravity
  • Ability to interpret motion graphs
NEXT STEPS
  • Study the principles of Newtonian physics, focusing on free fall and acceleration
  • Learn about vector operations, including addition, subtraction, and scalar multiplication
  • Explore the effects of gravity on different objects in free fall
  • Practice solving physics problems related to motion and vectors
USEFUL FOR

This discussion is beneficial for students studying physics, particularly those struggling with concepts of motion, acceleration, and vector math. It is also useful for educators seeking to clarify these topics for their students.

mustangburch
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I am not very good at this so please help me someone. I am not sure if I am in the right forum or not but i can almost put money on you guys know these simple questions.

1. Which of the following statements applies to the motion of a ball rising and then falling in free fall?
I. The ball has constant acceleration as it moves upward.
II. The ball has constant acceleration at the top of its path.
III. The ball has constant acceleration as it moves downward.
a. I only
b. III only
c. I and III
d. I, II, and III

2. Objects that are falling toward Earth in free fall move
a. Faster and faster
b. slower and slower
c. at a constant rate
d. slower then faster

3. Multiplying or dividing vectors by scalars results in
A. Vectors
B. Scalars
C Vectors if multiplied or scalars if divided
D. Scalars if multiplied or vectors if divided

Please help if you can. I am having a hard time with this class
 
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I'm moving this to the Homework Help forum.

mustangburch,

Our policy here is that we will help you with this, not do it for you. Please post your own thoughts on these questions, and we will give you a hand from there. Even if you get them all wrong, it is still better to try.
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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