While direction is not given, why not consider positive initial velocities for both objects? They can be collided at any angle, right? Aren't we supposed to calculate the sum of momentum in scalar form? m1*4 + m2*4 = m1*v1 + m2*v2 . Please explain.
Why is it that we can't just use the equation given on page 81 of the reference manual? "Knowing the value of e, the velocities after the impact are given as"
Hello, you can use that equation too and you should be able to get the same answer. However, I prefer using the equations I used here because it provides a good understanding of the equations. Thank you for sharing that 😊
@@Genieprep Thanks for the clarification! I kept getting -4 & 4 when using the other equation but realized I was using a positive velocity for both v1 and v2. Thank you for the awesome videos!
Oh that makes sense! Just be careful during your exam. Also, when you are not sure about a question, drawing always helps, so keep that in mind and Good luck with your studying!
The reason why +4 m/s and -4 m/s is not the correct answer, is that this would imply a perfectly elastic collision. We were given a coefficient of restitution of 0.5, rather than 1, so kinetic energy cannot be conserved.
You're so knowledgeable! Thanks for teaching this. Cheers!
Thank you for watching 😊
Great stuff! Keep sharing your gift with the world:)
Thank you for watching!
Wow, this is fantastic! Thanks for the explaination!
Thank you for watching 😊
Thank you for videos
Thanks for making this video!
Thank you
So informative and helpful! Great video
Thank you 😊
This is such a great video. Incredibly well explained.
Thank you for watching!
You should add this one to the FE Dynamics Playlist
Thanks for letting me know!
Good problem!
Thanks for watching, Joe! We're glad you found it helpful.
Thank you for this.
Thank you for watching!
Great share love!
Thank you 😊
While direction is not given, why not consider positive initial velocities for both objects? They can be collided at any angle, right? Aren't we supposed to calculate the sum of momentum in scalar form?
m1*4 + m2*4 = m1*v1 + m2*v2 .
Please explain.
The problem statement states the balls have a head on collision. They must be going in opposite directions for that to be true.
Why is it that we can't just use the equation given on page 81 of the reference manual? "Knowing the value of e, the velocities after the impact are
given as"
Hello, you can use that equation too and you should be able to get the same answer. However, I prefer using the equations I used here because it provides a good understanding of the equations. Thank you for sharing that 😊
@@Genieprep Thanks for the clarification! I kept getting -4 & 4 when using the other equation but realized I was using a positive velocity for both v1 and v2. Thank you for the awesome videos!
Oh that makes sense! Just be careful during your exam. Also, when you are not sure about a question, drawing always helps, so keep that in mind and Good luck with your studying!
wow!! this is above my brain level haha!
Hahaha 😂 Thank you for watching!
Where was this video when I was in college?
I was probably just learning it 😂
8 kg is crazy
I don’t think you got the right answer.
Can you try the equation on page 112 for a new hand book you will get 4 m/s and -4 m/s
The reason why +4 m/s and -4 m/s is not the correct answer, is that this would imply a perfectly elastic collision. We were given a coefficient of restitution of 0.5, rather than 1, so kinetic energy cannot be conserved.