18:15 X L3 Dynamics Assignment 2 Problem 1 A light aircraft has a mass of 4000kg. It is circling an airport at a speed of 150m's at a radius of 1000m. Calculate the a) centripetal acceleration b) centripetal force Problem 2 A mass of 20g is placed on a flat disc. It is connected to the centre of the disc by a spring 20cm long. The spring constant is 35N/mm. The disc is spinning at 2000rpm. Calculate the a) centripetal acceleration b) centripetal force c) extension of the spring Problem 3 Three masses, labelled A, B and C are placed on a rotating disc as shown. The masses are 2kg 1.5kg and 1kg respectively. The radius of cach mass from the centre of the disc is 100mm, 50mm and 75mm respectively. D Calculate the mass D placed at 125 mm from the centre of the disc to balance the disc, and where it should be placed by carrying out the following steps a) complete the table Mass (kg) Radius (mm) Mr (kg mm)