NCERT Exemplar Class 8 Science Chapter 12: Friction
NCERT Exemplar Solutions for Class 8 Science Chapter 12 – Friction explains how friction acts as a necessary but opposing force. The chapter begins with the definition of friction and its types – static, sliding, and rolling friction. Students learn about the factors that affect friction, such as surface roughness and the weight of objects.
The chapter highlights the advantages of friction, such as enabling walking, holding objects, and driving vehicles. It also covers the disadvantages, including wear and tear of machines, energy loss, and reduced efficiency. NCERT Solutions for Class 8 Science explain methods of reducing friction, like lubricants, wheels, ball bearings, and streamlined designs. At the same time, examples where friction is increased intentionally, like brakes in vehicles and soles of shoes, are discussed. By practicing the NCERT Exemplar Solutions for Class 8 Science Chapter 12, learners understand both the useful and harmful aspects of friction. The chapter builds logical thinking and connects physics with everyday activities.