haha thank you Hayley1, I always thought that my hand writing is ugly
I understood what you wrote Alan,
but the book answer confusses me,
why did he put the kinatic energy of the ramp in the equation of conservation of energy ?!
it suppose to be for the box !
conservation of linear momentum
Yes, the magnitude is correct because of the square
Thank you Alan for your help.
Now I get it .
Thank you Alan
The work done on the spring to get it from 5" to 2" is k*3^2/2
Here how did you get 3^2 ? it must be ( 5^2 - 3^2 ) according to ( Sf^2 - Si^2 ) !
Thank you Melody and Alan .
And please explain this question for me
So his answer is incorrect too right ?
Thank You