Chapter 11 - Force and pressure

Question 1

Compression

Answer 1

Squeezing together

Question 2

Density

Answer 2

Mass per unit volume of a substance

Question 3

Fluid

Answer 3

A liquid or gas

Question 4

Force

Answer 4

Something that can change the motion of an object, measured in newtons.

Question 5

Force diagram

Answer 5

An illustration showing the forces on an object

Question 6

Gravitational field strength

Answer 6

The force of gravity acting on 1kg of mass in the field, equal to the acceleration of free fall (g)

Question 7

Mass

Answer 7

Quantity of matter in an object - a measure of the difficulty of changing the motion of an object, in kg.

Question 8

Normal

Answer 8

A straight line through a surface or boundary perpendicular to the surface boundary.

Question 9

Pressure

Answer 9

Force per cross-section area for a force acting on a surface at right angles to the surface, measured in pascals (Pa) or newtons per square meter (N/m squared)

Question 10

Upthrust

Answer 10

The upward force that acts on a body completely or partially submerged in a fluid.

Question 11

Weight

Answer 11

The force of gravity acting on an object, measured in newtons (N)