NCERT Solutions for Class 8 Science Chapter 12
Important NCERT Questions
8th Chapter 12 Friction
NCERT Books for Session 2022-2023
CBSE Board and State Board
Questions No: 7
Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?
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Friction force is directly proportional to mass. Heavier box will put more force on the floor surface as compared to lighter box and therefore will experience more opposite force (friction). Seema will have to apply larger force.
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Seema, pushing the heavier box, will need to apply a larger force compared to Ishant pushing the lighter box. According to Newton’s second law of motion, the force required to accelerate an object is directly proportional to its mass. Therefore, Seema, pushing the heavier box with more mass, will need to exert a greater force to achieve the same acceleration as Iqbal pushing the lighter box.