A bead with a hole through it slides on a wire track. The wire is threaded through the hole in the bead, and the bead slides without friction around a loop-the-loop (see figure below). The bead is released from rest at a height h = 3.60R. h A R (a) What is its speed at point A? (Use the following as necessary: the acceleration due to gravity g, and R.) v = √3.20gR (b) How large is the normal force on the bead at point A if its mass is 4.90 grams? magnitude direction 0.106 N downward ✰ (c) What If? What is the minimum height h from which the bead can be released if it is to make it around the loop? (Use any variable or symbol stated above as necessary.) h=2.5R ×