A safe distance should be maintained so that sufficient time and space are available to react and stop safely if the truck suddenly applies its brakes. The required distance depends on speed, reaction time, and braking conditions.
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Chapter 9 “Atomic Foundations of Matter” explains how atoms combine to form matter. It covers molecules, elements, compounds and chemical formulas, helping me understand the composition, structure and properties of substances in everyday life clearly.
Chapter 8 “Journey Inside the Atom” explains the structure of atoms and discovery of subatomic particles. It covers electrons, protons, neutrons and atomic models, helping me understand the basic composition and properties of matter clearly.
Chapter 7 “Work, Energy and Simple Machines” explains the concepts of work, energy and power. It describes different forms of energy and simple machines, helping me understand how machines make work easier in daily life.
Chapter 6 “How Forces Affect Motion” explains how different forces change the motion of objects. It covers balanced and unbalanced forces, acceleration, friction and Newton’s laws, helping me understand movement and effects of force in daily life.