Page 27 - Physics

Introduction to Physics

previously to investigate whether the are observed. For example, the theory of
digital stopwatch is more accurate gravity explains why things fall down
than the analogue stopwatch in when we drop them. It says that all objects
measuring the time taken to complete with mass are attracted to each other,
one oscillation. Briefl y address the and that’s why we stay on the ground
following: and do not fl oat on air. Many theories
(a) What was the hypothesis? explain various physical phenomena. In
(b) What kind of an experiment can be this section, we shall concentrate on the
used to test the hypothesis? theory of gravity and its impact human
(c) What conclusion can be drawn from beings.
this experiment?
(d) After comparing the measurements, Theory of gravity
which stopwatch do you think is
more accurate than the other? and The theory of gravity is the fundamental
(e) Write a report explaining your theory that explains the force of attraction
experiment and conclusions. between two objects that have mass. It
says that objects with mass are attracted to
The measurement from a digital stopwatch is each other. The force of attraction between
more accurate than the one from an analogue such objects is referred to as the force of
stopwatch. The digital stopwatch therefore, gravity. This force is very important for
gives a more precise measurement of time our daily activities. Activity 1.4, will help
than the analogue one. you to understand the impact of the force
of gravity in our daily lives. All objects
Task 1.6
on the earth are attracted toward the earth
1. Discuss the steps for carrying out because the earth is more massive than
experiments using scientifi c method. other objects.
2. Discuss the application of scientifi c
investigation method for a simple Signifi cance of the theory of gravity
pendulum.
3. Briefl y explain the importance of (i) It explains the arrangement and motion
forming hypothesis before doing an of planets, moon, and other celestial
experiment. bodies in the solar system and beyond.
(ii) Helps to understand the tides and

Earth’s motion around the sun.
Scientifi c theory
A theory in physics is a big idea or (iii) Provide the basis for space exploration
and satellite technology.
explanation that scientists come up with
to describe how something in nature (iv) It infl uences our daily lives, from

behaves. Think of it like a story that tries walking on the earth’s surface to the
launching of spacecraft into space.
to explain why things happen the way they

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Physics Form 1 Final.indd 21 16/10/2024 20:55