Available Answers

1. 1.

   Write true or false for each statement. Rewrite the false statement correctly.

   1. Pressure is inversely proportional to thrust and directly proportional to the area of contact.
   2. A liquid seeks its own level.
   3. Manometer reading remains the same for different positions at same depth inside a liquid.
   4. A horse can run faster and easier on the deserts as compared to a camel.
   5. Bulldozers do not damage the ground as much as a car, due to their big wheels.
   6. All states of matter exert pressure.
   7. By making a knife sharp, we decrease the area of contact and hence, the pressure increases.
   8. When we move from sea level to higher altitude. the atmospheric pressure increases.
   9. Dams and high rise buildings have a broad base to reduce pressure.
   10. An altimeter pressure of liquid.
2. 2.

   Fill in the blanks :

   1. The force acting normally on a given surface is called the __________________.
   2. Pressure is directly proportional to __________________ and __________________.
   3. Liquid pressure remains the __________________ in all directions at a given depth.
   4. Pressure which is exerted by the liquids on the sides of the container is called __________________.
   5. At sea level, the atmospheric pressure is __________________.
   6. Higher is the altitude, __________________ is the atmospheric pressure.
   7. Pressure is the ratio of __________________ to __________________.
   8. To reduce pressure, the tanks move over __________________ rather than wheels.
   9. The unit of pressure is __________________ or __________________.
   10. Aneroid barometer can also be used as an __________________.
3. 3.

   Tick the most appropriate answer :

   1. If F is a force acting normally on a surface of area A, then the pressure P is given by
      1. F x A
      2. F / A
      3. F + A
      4. 2F+A
   2. The S.I. unit of pressure is :
      1. Pascal
      2. Joule
      3. Newton  
      4. dyne-cm^-2
   3. A device to measure liquid pressure is :
      1. thermometer
      2. barometer
      3. manometer
      4. lactometer
   4. The liquid used in a simple barometer is
      1. alcohol 
      2. water
      3. mercury
      4. kerosene 
   5. The feet of lizards act like :
      1. moving pads
      2. drilling pads
      3. suction pads
      4. none of the above
   6. Pressure exerted by a liquid is due to its :
      1. weight
      2. mass
      3. volume
      4. area
   7. Pressure inside a liquid increases with :
      1. increase in depth
      2. decrease in depth
      3. decrease in density
      4. none of the above
   8. If the density of the liquid used in a barometer is increased, the pressure will :
      1. increase
      2. decrease
      3. remain the same
      4. none of the above
   9. The pressure exerted at any point on an enclosed liquid is transmitted
      1. only in one direction
      2. only on the sides of the container
      3. in all directions
      4. upward and downward direction
4. 4.

   Define pressure. Give its S.I. unit.

5. 5.

   State the three factors on which pressure in liquids depend.

6. 6.

   Define thrust. What is its S.I. unit?