(a) A mass of 2.0kg is suspended from a fixed pointA by a string 50cm long, is moving in a horizontal circle of radius 30cm (fig 3). A Fig 3 50 cm 30 cm 2kg Calculate: i. the tension in the string 12 ii. the centripetal force acting on the mass (2) ili. Hence determine the period of the mass in it's circular orbit (b) A special prototype model acroplane of mass 40ig has a control wire 8.Om long attached to its body. The other end is allached in a fixed point. When the aeroplane flies with its wings horizontal, it makes one revolution every 4.0s and the control wire is raised 30" shove the horizontal L Draw a diagram showing the forces excried upon the plane