A long rod has the end A on the horizontal plane and the other end B on an inclined plane with the angle a = 50. If the end A is pushed horizontally at 1 m/s, how fast (in m/s) is the end B sliding up on the inclined plane when AC = 5 m and BC = 10 m. B D a C (m/s) Notes: 1. The answer must be entered as a decimal number. Example: 3.47 2. Do not enter the unit of measurement. 3. Round the answer to two decimal places, 4. The tolerance is 5%