NCERT Solutions for Class 9 Science Chapter 8 Force and Laws of Motion Page No. 91 Question 1. NCERT Questions Exercises
9th Science Chapter 8 Force and Laws of Motion
NCERT Academic Session 2023-2024
CBSE Board and Others state Board
Description:
Force refers to an influence causing motion changes. Newton’s Three Laws of Motion elucidate how forces affect objects: 1. Objects stay at rest or move uniformly unless acted upon (inertia). 2. Force equals mass times acceleration. 3. For every action, there’s an equal and opposite reaction (action-reaction principle).
Inertia, a property of matter, is tied to an object’s mass.
(a) Between a rubber ball and a stone of the same size, the stone likely possesses more inertia because stones generally have a greater mass compared to rubber balls.
(b) Comparing a bicycle to a train, the train exhibits more inertia due to its substantially larger mass compared to the bicycle.
(c) In the case of a five-rupee coin and a one-rupee coin, the five-rupee coin is expected to have more inertia owing to its typically greater mass relative to the one-rupee coin.