Helping My Autistic Son with Momentum and Friction in a Dog's Movement

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SUMMARY

The discussion focuses on calculating the change in momentum and average frictional force for a dog with a mass of 113 grams running at 2.00 m/s, which slides 80.0 cm during deceleration. The key formulas involved are impulse (J=FΔt), force (F=ma), and acceleration (a=Δv/t). The user emphasizes the need to determine acceleration to solve the problem, as they already have mass and time values. The conversation highlights the importance of understanding these physics concepts to assist the user's son effectively.

PREREQUISITES
  • Understanding of basic physics concepts, including momentum and impulse.
  • Familiarity with Newton's second law (F=ma).
  • Knowledge of kinematic equations for calculating acceleration.
  • Ability to manipulate units and convert measurements (e.g., grams to kilograms).
NEXT STEPS
  • Research how to calculate impulse and its relation to momentum.
  • Learn about kinematic equations and their applications in real-world scenarios.
  • Study the concept of friction and how it affects motion.
  • Explore practical examples of force and acceleration calculations in physics problems.
USEFUL FOR

This discussion is beneficial for parents of children with autism seeking to support their learning in physics, educators looking for practical examples to teach momentum and friction, and students needing assistance with physics homework related to motion and forces.

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Homework Statement


I don't know how to use this forum so here we go. My 16 year old autisitc son is stumped with this question. If anyone can help me send him in the right direction it would be great, I am lost.

dog with a mass of 113 g runs to the right at 2.00 m/s, sees a mouse stopes using paws, slides 80.0 cm during deceleration, dog turns and runs other direction, calculate the magnitudes of change in dog's momentum AND the average frictional force that brings about this change.

He can't figure out what formula to use and I have no idea, can anyone point me in the right direction?

what happened to 2+2=4?


Homework Equations






The Attempt at a Solution



total 1^p=0
slow down segment = 0.226ns
run in opposite direction segment = 0.226ns

help?
 
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Magnitude of the change in the dog's momentum basically means an Impulse. Which can be figured out using the formula J=FΔt.

J=Impulse aka the answer to the first question
F=force
Δt= Change in time

You have Δt but still need force.

F=ma

m=mass
a=acceleration

You have mass but still need acceleration

a=Δv/t

Δv=change in velocity
t=time

Hopefully you can work that out good luck and I will still be online for more question
 

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