Chapter 6: Force and Pressure

Fill-in-the-blank flashcards covering key concepts from the notes on Force and Pressure.

If force is kept constant, pressure is inversely proportional to .

area

The SI unit of pressure is .

Pascal (Pa)

1 Pa is equivalent to N/m².

1

The blunt edge of a knife has a larger than the sharp edge.

area

The pressure on the sharp edge is greater than on the blunt edge when the same force is applied because the sharp edge has a smaller .

area

Tractor tyres spread the vehicle’s weight over a large area to reduce the exerted.

pressure

The instrument used to measure atmospheric pressure is called a .

barometer

Atmospheric pressure at sea level is about kPa.

100

The pressure exerted on our head by the air is approximately equal to the force of gravity on an object of mass kg.

225

Atmospheric pressure decreases with increasing .

altitude

Air exerts pressure in all .

directions

Like solids, all liquids and gases (fluids) also exert .

pressure

The Magdeburg hemispheres demonstrated the power of pressure.

atmospheric

The balloon inflates due to the exerted by air on the inner walls.

pressure

Activity-4 shows that, if area is constant, greater the force (weight), greater is the .

pressure

If more gas is added to a balloon, more is exerted on the balloon walls.

pressure

Pressure is defined as the per unit area.

force