hey its another one :

                           1)    FRICTION ALWAYS OPPOSES RELATIVE VELOCITY OF  A BODY. HERE THE WORD" RELATIVE" IS MOST IMPORTANT.

                          

                          2)     IF  L  IS THE LENGTH  OF SIMPLE PENDULUM. AND M  IS THE MASS OF ITS BOB.LET THE BOB GIVEN A VELOCITY V ALONG HORIZONTAL DIRECTION.

                        THE BOB PERFORMS OSCILLATIONS IF " V ROOT 2GL."

                       THE BOB DESCRIBES VERTICAL CIRCLE OF RADIUS  L IF

                         "

   VROOT5GL."

                        THE BOB NEITHER PERFORMS OSCILLATIONS NOR DESCRIBE VERTICAL CIRCLE IF  V LIES BETWEEN" ROOT2GL" AND "ROOT5GL"