2.A piece of wire 32cm long is cut into two parts. Each part is bent into a square. The total area of two square is 34cm^2. Let x cm be the length of one side of one square and y cm be length of one side of the other square.
(a) express the total area of the two square in terms of x and y.
(b) express the length of the wire in terms of x and y....
The system in the lift is moving upwards with an acceleration a=g/2 as shown in the figure (ignore all frictions). Objects A and B have the same mass m, and are connect by a string over a pulley. The masses of the string and the pulley can be neglected. Gravity points downwards. The tension of the string is,