answer the question

A small mass m slides with negligible friction down an incline at an angle of 25.76 with respect to the horizontal. It then drops down to a horizontal surface and bounces elastically back up as shown. The picture is to scale. It shows the position of the mass at equal time intervals starting from rest at Q. The height of the mass at T is the same as at X. Click here to view the motion of the mass m. . The speed change between V and R is between Q and V. . The velocity of m at T is that at X. The mechanical energy of m at P is that at X. The speed of m at T is that at S. The size of the total force on m at V is at P. The size of the total force on m at P is at U