http://physics.ucsd.edu/students/cou..._solutions.pdf
Please go to the website and scroll down to question 75a,
why is g=9.8ms^2 is used in the solution instead of g=-9.8ms^2?
Isn't it defined by the question that downward is negative? ( x1=-0.100m )
For part d,
what is -kx in the solution?
Isn't it -1/2kx^2?
Thank you very much!!
Please go to the website and scroll down to question 75a,
why is g=9.8ms^2 is used in the solution instead of g=-9.8ms^2?
Isn't it defined by the question that downward is negative? ( x1=-0.100m )
For part d,
what is -kx in the solution?
Isn't it -1/2kx^2?
Thank you very much!!