Hi, This question has been bothering me: Two particles A and B are connect via string and the string passes over a pulley. The pulley is at the top of an inclined plane. The question is 'The string is described as being light. State how you have used the fact that the string is light in your calculations' The answer is 'tension in the string remains constant at both A and B'- i DONT GET THIS...I would have said the mass of the string is not considered in the calculations.....can someone explain to me how the tension answer is reached?? ...please?