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5. Interaction of objects
Imagine you go on a Space mission
and visit different planets in the Solar In Unit 4 you learnt:
System. Will there be any forces acting ✔ about mass, volume and density of
on you when you reach other planets? substances/objects Physics
textbooks nis edu kz
What is your weight going to be on ✔ how to measure mass and volume of
the Moon, Mars and Jupiter? You will substances/objects and their units
find the answers to these and other ✔ how to calculate volume and density of
questions in this unit. objects of different shapes
In this unit you will learn:
✔ about a phenomenon called inertia
✔ the meaning of force and gravity
✔ the difference between the weight
and mass of an object
✔ about the interaction of objects with
other objects
Key phrases:
✔ The weight of an object depends on … , while its
mass depends on …
✔ Weight is measured in … , while the mass of the
object is measured in …
✔ Force has direction, … and …
CCL In Maths classes you studied vectors, learnt
how to find the coordinates of a point in the
Cartesian coordinate system and how to plot
straight lines on the plane. These skills will help
you to draw force vectors on a certain scale and
use graphs to define the magnitude of force.
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