Mastering Newton's Laws for 9th Grade Talent Exam: Overcoming FBD Problems

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SUMMARY

This discussion focuses on mastering Newton's Laws, specifically addressing the challenges faced in solving Free Body Diagram (FBD) problems for a 9th-grade talent exam. The participant consistently arrived at an incorrect answer of 5 instead of the correct answer of 7 due to overlooking the impact of static friction between the blocks. The importance of accurately drawing and analyzing Free Body Diagrams is emphasized as a crucial step in solving physics problems related to forces and motion.

PREREQUISITES
  • Understanding of Newton's Laws of Motion
  • Knowledge of Free Body Diagrams (FBD)
  • Concept of static friction
  • Basic problem-solving skills in physics
NEXT STEPS
  • Study detailed examples of Free Body Diagrams in physics problems
  • Learn about the effects of static friction on motion
  • Practice solving Newton's Laws problems with varying weights
  • Review common mistakes in FBD analysis and how to avoid them
USEFUL FOR

This discussion is beneficial for 9th-grade students preparing for talent exams, educators teaching physics concepts, and anyone looking to improve their understanding of Free Body Diagrams and Newton's Laws.

sidt36
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I have been preparing for a 9 Th grade talent exam and i can get my head around this problem

N0qBHe4NTfSZRb2T4bpH.png


I keep getting the same answer 5, i used fbd

The answer is 7 ; help me out where am i wrong
 
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The static friction between the lower block and the table is also affected by the weight of the top block.
 
aah forgot bout that
 
sidt36 said:
aah forgot bout that
You wouldn't have forgotten if you had drawn a free body diagram.
 
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