During the free fall of the object, the decrease in potential energy, at any point in its path, appears as an equal amount of increase in _________________.
A beedi making workshop can hire 5 women by paying them Rs. 300 per day. The 6th woman demands Rs. 350 per day. If this woman is hired then all other women must be paid Rs. 350. The marginal resource (labour) cost of the 6th woman is