Force Problem, Fuzzy Dice hanging from a rearview mirror

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SUMMARY

The problem involves calculating the acceleration of a race car based on the angle of a string holding fuzzy dice, which hangs at a 70° angle from the vertical. The fundamental equation to use is Newton's second law, F=MA. To solve the problem, one should create a free-body diagram to identify the forces acting on the fuzzy dice, which will help in determining the relationship between the angle and the acceleration of the car.

PREREQUISITES
  • Understanding of Newton's second law (F=MA)
  • Ability to draw and interpret free-body diagrams
  • Basic knowledge of trigonometry, particularly right triangles
  • Familiarity with concepts of constant acceleration
NEXT STEPS
  • Learn how to construct and analyze free-body diagrams in physics
  • Study the relationship between angles and forces in inclined planes
  • Explore problems involving constant acceleration and its applications
  • Review trigonometric functions and their applications in physics
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Students studying physics, particularly those focusing on mechanics and forces, as well as educators looking for practical examples of applying Newton's laws in real-world scenarios.

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Homework Statement


Heres the problem, I've done these kind of problems before but it has been about a year for me since I've done one and I can't seem to remember how to anymore:
A pair of “fuzzy dice” hangs from a string attached to the rear view mirror of a race car moving with constant acceleration. Find the acceleration if the string makes a 70° angle with the vertical.


Homework Equations


F=MA


The Attempt at a Solution


I am not sure where to start other than I drew a triangle with a 70 degree angle. If someone could just please give me a place to start off from, I would really appreciate it. Thanks!
 
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cmsoccer21 said:

Homework Statement


Heres the problem, I've done these kind of problems before but it has been about a year for me since I've done one and I can't seem to remember how to anymore:
A pair of “fuzzy dice” hangs from a string attached to the rear view mirror of a race car moving with constant acceleration. Find the acceleration if the string makes a 70° angle with the vertical.


Homework Equations


F=MA


The Attempt at a Solution


I am not sure where to start other than I drew a triangle with a 70 degree angle. If someone could just please give me a place to start off from, I would really appreciate it. Thanks!
A free-body diagram would a good place to start. Identify all the forces acting on the dice, what can you say about these forces?
 
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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