So fustrated and need some desperate help

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SUMMARY

The discussion centers on a physics problem involving work and forces, specifically addressing parts c and d of an assignment. The user struggles with calculating the work done on a crate moved at constant velocity, initially attempting incorrect formulas. A key insight provided is the importance of considering the work done by friction as negative and the necessity of multiplying by distance to find the correct answer.

PREREQUISITES
  • Understanding of the work-energy theorem
  • Basic knowledge of forces and motion in physics
  • Familiarity with trigonometric functions, specifically sine
  • Ability to perform calculations involving distance and force
NEXT STEPS
  • Review the work-energy theorem and its applications in physics
  • Study the concept of net work and how it relates to constant velocity
  • Learn about the effects of friction on work calculations
  • Practice solving physics problems involving forces and motion
USEFUL FOR

Students struggling with physics concepts, particularly those dealing with work, forces, and the work-energy theorem. This discussion is beneficial for anyone seeking to improve their problem-solving skills in physics.

HighVoltage
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all,
i am stuck on this problem. physics has not been good to me this semester. its like "in one ear out the other"

this is the problem:
Untitled-1.jpg


i can't get c or d.

for c i tried .25(29*9.8+117.37*sine(40)) that wasnt right

for d i tried 117.37*4.1 and that wasnt right

please help me.
 
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For part c), you forgot to multiply by the distance... also the work by friction is negative...

Think about this... the crate is moved at constant velocity... so what is the net work done on it by all forces? (what does the work energy theorem say?)
 

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