Saved Bookmarks
| 1. |
A block of wood of dimensions 30cmx15cmx10cm and mass 400g is kept on ahorizontal table.a) Find the maximum and minimum pressure exerted by the object on the table ifkept with surfaces having different dimensions in S.I. unit. (take g=10m/s)b) Also find the ratio of the minimum and maximum pressure thus obtained. |
|
Answer» a) 266.66 N/m2, 88.88 N/m2 b 1:3 Explanation: pressure = Force/Area. since the WEIGHT is same, pressure is maximum when BASE area is minimum. i.e. A= 0.15*0.10 = 0.015 m2. MAX area= 0.3*0.15 = 0.045 m2 Force= 0.4*10= 4N Max pressure = 4/0.015 = 266.66 N/m2 Min pressure = 4/0.045 = 88.88 N/m2 Ratio of min pressure : max pressure = 1:3 |
|