Page 17 - Physics

Introduction to Physics

Industry
Physics principles and laws have
enabled industries to assemble,
calibrate, and use highly accurate
instruments. Physics can be
applied in various industries such
as construction, manufacturing,
and automobile industries. Many
instruments used in different
industries apply the laws and
principles of physics in their (a) Voltmeter (b) Tongs (c) Tripod stand
operation. Examples of these and wire gauze
instruments are, sawmills used
for cutting wood, cranes used for Figure 1.18: Laboratory apparatus
lifting heavy loads, and spanners Generally, physics is applied in many fi elds. It
used for tightening and loosening is an important discipline that enables experts to
nuts and bolts.
determine how structures like bridges, roads, and
railways should be built to ensure safety.
In schools
In schools, equipment such as Acti vity 1.1
computers, photocopy machines,
printers, projectors, language Aim: To demonstrate applications of
translating devices, telescopes, physics.
cameras, and binoculars, use the Materials: A plane mirror, a scale balance,
knowledge of physics. different masses (5 g, 10 g, 15 g),
fl agpole
In addition, instruments and
apparatus used in school Procedure
laboratories are made using the Part I:
knowledge and skills acquired 1. Look at your image in a plane mirror.
in physics. Examples of such 2. Observe how your face looks like.
apparatus and instruments
are shown in Figure 1.18. Part II:
Instruments should meet certain 1. Prepare a scale balance.
specifi cations or standards that 2. Place a 10 g mass on one side and a 15 g mass
are universally accepted. This is on the other side of the scale balance.
to enable the instrument to give
the same standard or common 3. Record your observations.
measured value when used 4. Now add a 5 g mass on the side with 10 g and
throughout the world. observe what happens.

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