Hi, i am having a slight confusion with this theorem. I understand that if a car travels horizontally for s m at the uniform acceleration, the Net Work Done = Change in K.E. (by Work-Energy Theorem) The change in K.E. is the amount of joules required to exert the amount of Net Force on the car to move a distance of s m. However, if the car is moving diagonally 45 degress upwards, then Net Work Done = Change in K.E. + Change in G.P.E. (by manual logical method to find work done) so, the total Change in K.E. + Change in G.P.E. is the amount of joules required to exert the amount of Net Force on the car to move 45 degrees diagonally upwards. I am just wondering, is it possible to apply Work-Energy Theorem in cases where a body is involved in vertical movement... Because, in the second scenario above, i don't see any work-energy theorem being applied. Furthermore, Work-Energy Theorem only states that Net Work Done = Change in K.E. ;no other kinds of energy was included in the formula, Can someone please enlighten me? Very much appreciated. Thank You!