A body weighing 5 kgf, placed on a surface of area 0.1 m², exerts a thrust on the surface equal to:

1. 50 kgf
2. 5 kgf
3. 50 kgf m^-2
4. 5 kgf m^-2

The feet of lizards act like:

1. moving pads
2. drilling pads
3. suction pads
4. none of the above

Pressure inside a liquid increases with:

1. increase in depth.
2. decrease in depth.
3. decrease in density.
4. none of the above.

The atmospheric pressure at sea level is nearly:

1. 10 Pa
2. 100,000 Pa
3. 100 Pa
4. 10,000 Pa