A block of mass 10kg is released from rest at the top of a smooth incline that is 25m long and makes an angle of 30∘ with the horizontal. Take g=9.8m/s2.
(i) Calculate the vertical height of the top of the incline above its bottom end.
(ii) Determine the speed of the block when it reaches the bottom of the incline.
(iii) Find the kinetic energy of the block at the bottom.
(iv) Comment on the change in the block’s potential and kinetic energies between the top and the bottom of the incline.