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Sonal Chauhan
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Option (iv) is correct because according to Newton’s third law of motion, whenever two objects interact during a collision, they exert equal and opposite forces on each other regardless of differences in their masses.

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Sonal Chauhan
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A cushioned landing mat increases the impact time during which the athlete’s downward velocity reduces to zero. According to Newton’s second law, extending the duration reduces acceleration, thereby significantly reducing the impact force and preventing injury.

a high jump eventa landing mat or sand bed is placed for the athlete to fall uponchapter 6 how forces affect motion question answerclass 9 science chapter 6 how forces affect motion solutionsncert solutions – how forces affect motionthe reason behind it
Sonal Chauhan
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Option (i) is correct because block P experiences an unbalanced net force of 1 N towards the right, while block Q moves at constant velocity, meaning the net external force acting upon Q is zero.

chapter 6 how forces affect motion question answerclass 9 science chapter 6 how forces affect motion solutionsmagnitudes 4 n and 5 n are acting in opposite directionsp and q on a smooth horizontal surfacep experiences a net force and q does not experience a net force