Meera chose to use a block and tackle system of ‘9’ pulleys instead of a single movable pulley to lift a heavy load.

(a) A block and tackle system with multiple pulleys provides a higher mechanical advantage, which means less effort is required to lift a heavy load compared to a single movable pulley since in a single movable pulley, mechanical advantage (M.A.) is 2 but in a block and tackle system with 9 pulleys, the M.A. can go up to 9 (ideally), making it much easier to lift heavier loads with the same effort.

(b) To ensure smooth and balanced operation, more pulleys should be in the upper fixed block because :

1. It reduces the weight of the movable block, making it easier to lift.
2. It helps in maintaining stability and reduces oscillation during lifting.
3. It also makes arrangement and threading of ropes more efficient and manageable.