Jumping from a moving wagon momentum problem -- find Buffy's weight

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SUMMARY

The discussion centers on a physics problem involving momentum and weight. Buffy, who weighs 11.8 kg, jumps off a wagon moving at 3.8 m/s, resulting in her moving at 1.8 m/s while the wagon accelerates to 8.87 m/s. The confusion arises from the distinction between mass and weight, as weight is a force measured in newtons, not grams or kilograms. The key takeaway is understanding the relationship between mass, weight, and the forces acting on them in the context of momentum conservation.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the concepts of mass and weight
  • Basic knowledge of momentum conservation
  • Ability to perform calculations involving velocity and mass
NEXT STEPS
  • Study the relationship between mass and weight in physics
  • Learn about momentum conservation principles in closed systems
  • Explore the concept of force and its units in the SI system
  • Practice solving problems involving moving objects and relative velocity
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This discussion is beneficial for physics students, educators, and anyone interested in understanding the principles of momentum and the distinction between mass and weight in physical scenarios.

Jujubee37
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Homework Statement
Buffy is rolling along in her 11.8 kg wagon at 3.8 m/s (in the positive direction) when she jumps off the back. She continues to move forward at 1.8 m/s relative to the ground. This causes her wagon to go speeding forward at 8.87 m/s relative to the ground. How much does Buffy weigh?
Relevant Equations
n/a
I have attempted to plug in grams, kiliograms, and even pounds but it was wrong.
 
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In everyday life, we often see "weight" given in grams or kilograms. However, in physics, the gram and the kilogram are units of mass while weight is associated with the force of gravity. What is the unit of force in the SI system?
 
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Jujubee37 said:
Homework Statement:: Buffy is rolling along in her 11.8 kg wagon at 3.8 m/s (in the positive direction) when she jumps off the back. She continues to move forward at 1.8 m/s relative to the ground. This causes her wagon to go speeding forward at 8.87 m/s relative to the ground. How much does Buffy weigh?
Relevant Equations:: n/a

I have attempted to plug in grams, kiliograms, and even pounds but it was wrong.
Attempted to plug in into what? We do not know what formula or even concept you are trying to use. As such it is impossible to pinpoint where you are going wrong.
 

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