Apendulum consists of a 2 kg bob attached to a light string of length 3 m. the bob is struck horizontally so that it has an initial horizontal velocity of 4.1 m/s. for the point at which the string makes an angle of 30° with the vertical, calculate the following: (a) the /s)(b) the gravitational potential energy (relative to its value is at the lowest )(c) the tension in the )(d) what is the angle of the string with the vertical when the bob reaches its greatest )