N identical carts are connected to each other using strings of negligible mass. A pulling force F is applied on the first cart and the system moves without friction along the horizontal ground. The tension in the string connecting 4h and 5th cart is twice the tension in the string connecting 8th and 9th cart. Find the total number of carts (M) and tension in the last string. NN-1 2 F

N identical carts are connected to each other using strings of negligible mass. A pulling force F is applied on the first cart and the system moves without friction along the horizontal ground. The tension in the string connecting 4h and 5th cart is twice the tension in the string connecting 8th and 9th cart. Find the total number of carts (M) and tension in the last string. NN-1 2 F