1.A telephone cable is clamped at A to the pole AB. Knowing that the tension in the right-hand portion of the cable is T1= 800 lb. determine by trigonometry (a) the required tensoin T2 in the left hand portion if the R of the force exerted by the cable at A is to be vertical, (b) the corresponding magnitude of R.
2.An airplane A takes off with a constant speed equal to vo=200 km/h. The path of the airplane is described by the equation y=kx^2, where k=6 x 10^-4 m^-1. Provide the expression for the velocity and acceleration of the airplane when x=390m. Express the velocity in m/s and the acceleration in m/s^2.