Problem Statement 53) Calculate the height of a water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g/cm^3. Solution (continuing with cgs system data)Pressure of mercury column is hdg = 70 x 13.6 x g ……..(1) let the height of water […]

## Solution to problems – class 9 – Set 1 Q52

Problem Statement 52) The area of base of a cylindrical vessel is 300 cm^2. Water (density = 1000 kg /m^3) is poured into it up to a depth of 6 cm. Calculate: (a) the pressure and (b) the thrust of water on the base. (g = 10 m/ s^2). Solution Pressure = hdg=(6/100)x1000x10 = 600 […]

## Solution to problems – class 9 – Set 1 Q49, Q50, Q51

49) A hammer exerts a force of 1·5 N on each of the two nails A and B. The area of cross section of tip of nail A is 2 mm^2 while that of nail B is 6 mm^2. Calculate pressure on each nail in pascal. Solution Nail A Force F = 1.5 N Area […]