11. The table below reveals the velocity v of a body during the specific time t, find its acceleration at t = 1.1? t: v: 1.0 43.1 1.1 47.7 1.2 52.1 1.3 56.4. 1.4 60.8 (J.N.T 12. The elevation above a datum line of 7 points of a road is given below: x: y: 0 135 300 149 600 157 900 183 Find the gradient of the road at the middle point. 1200 1500 1800 201 205 193 13. A rod is rotating in a plane. The following table gives the angle 0 (radians) through which the rod has t various values of the time t second. t: 0: 0 0 0.2 0.12 0.4 0.49 0.6 1.12 0.8 2.02 1.0 3.20 1.2 4.67 Calculate the angular velocity and the angular acceleration of the rod, when t = 0.6 second. 14. Find the value of f'(x) at x=0.4 from the following table using Bessel's formula f(x): 0,01 0.1023 0.02 0.1047 0.03 0.1071 0.04 0.1096 0.05 0.1122 0.06 0.1148 (U.P.T 15. Derive the formula y'o (y-8y +8y, -y,)/12h, for numerical differentiation at mid-point of a table. 16. Find the value of f' (8) from the table given below: (U.P.T 6 f(x): 1.556 7 1,690 9 1.908 12 2.158. (An