Page 14 - Physics

Physics for Secondary Schools

administering injections, feeding tubes and drip bottles, all apply physics principles.
Figure 1.11(b) shows some tools used in the medical fi eld.

(a) Infant incubator (b) Syringe and Injectable medicine

Figure 1.11: Medical equipment

Sources of energy

Some processes and machines help us to obtain energy for our daily use. These machines
make use of various laws of physics to give us different forms of energy. For example,
batteries, generators and solar cells, shown in Figure 1.12, provide electrical energy.
This energy is used in charging mobile phones, powering radios, and televisions. A car
battery provides the energy needed in a car. When devices like bulbs are connected to
these sources, they provide light energy for our daily use.

(a) Battery (b) Generator (c) Solar cell

Figure 1.12: Sources of energy
Transport

Application of the laws of physics such as motion and frictional forces ensure vessels
used in transportation like aeroplanes, trains, ships, cars and bicycles can move, brake
and stop when necessary. Figure 1.13 shows transport vessels which operate because
the laws related to friction, fl otation, and balance are observed and applied accordingly.

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Student’s Book Form One

Physics Form 1 Final.indd 8 16/10/2024 20:55