3. A conical pendulum of mass 7.5 makes an angle of 30 with the vertical. The cord is l.4m long. Find r-' '1 I...J d) the cord tension: 86 V N b) the speed of the mass 1.97 x m/s 4. A 8.8 kg mass moves along a frictionless track in a Circular loop of radius 6.0 m. At the top of the loop, the mass is inverted and barely completes the loop. What normal force acts on the mass when it reaches the bottom of the loop-x N