What are the Forces and Acceleration of a Ball Subjected to Three Forces?

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Homework Help Overview

The discussion revolves around analyzing the forces and acceleration of a ball subjected to three distinct forces. The problem involves concepts from dynamics, specifically focusing on free-body diagrams, force components, and motion analysis.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the need to draw a free-body diagram and calculate the components of the forces. Questions arise about where to start and the application of trigonometric functions to resolve forces into components.

Discussion Status

Some participants have made progress by creating a free-body diagram, while others express uncertainty about subsequent calculations. Guidance has been offered regarding the use of trigonometric functions for determining force components, and there is a suggestion to refer to textbook examples for further clarification.

Contextual Notes

Participants note that the problem is new to some, indicating a potential gap in foundational knowledge regarding unit vectors and force analysis.

MaryJane101
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A 0.5 kg ball initially at rest is subject to three forces:
1. F1 has a magnitude equal to 5.0 N and points 36.9 degrees above the horizontal direction (relative to the positive x direction),
2. F2 has a magnitude equal to 2.0 N and points to the left (negative x direction),
3. F3 has a magnitude equal to 4.0 N and points straight down (negative y direction).

Given these forces, answer the following questions:
a. Draw a free-body diagram showing the forces acting on the ball. Be sure to draw
vectors with the correct lengths. Determine the x- and y-components of each force
and label those values on your diagram.
b. Calculate the x- and y-components of the net force acting on the ball.
c. Calculate the x- and y-components of the ball’s acceleration.
d. Calculate the total distance traveled by the ball after 3.0 s.
 
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At what point do you get stuck?
 
Are you familiar with unit vectors?
 
I don't even know where to begin this is all new to me
 
i got the free body drawing but how do i do part b c d ?
 
For part b, you'll need to apply trig functions (sin and cos) to the forces you drew, using the angle of each of the 3 forces.

Also, keep in mind that:
Horizontal forces (acting to the left or right) act in the +x or -x direction -- there is no y-component.
Vertical forces (up or down) act in the +y or -y direction -- there is no x-component.

Surely there is an example worked out in your textbook or class lecture notes?
 

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