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JEE Main 201226 MayOnline
Exam
JEE Main
Year
2012
Date
26 May
Mode
Online
Subject
Physics
Chapter
Motion in One Dimension

JEE Main 2012 · 26 May · Online · Physics · Motion in One Dimension

A ball is dropped vertically downwards from a height h above the...

A ball is dropped vertically downwards from a height hh above the ground. It hits the ground inelastically and bounces up vertically. Neglecting subsequent motion and air resistance, which of the following graph represents variation between speed (v)(v) and height (h)(h) correctly?A ball is dropped vertically downwards from a height h above the ground. It hits the ground inelastically and bouncesA ball is dropped vertically downwards from a height h above the ground. It hits the ground inelastically and bouncesA ball is dropped vertically downwards from a height h above the ground. It hits the ground inelastically and bouncesA ball is dropped vertically downwards from a height h above the ground. It hits the ground inelastically and bouncesA ball is dropped vertically downwards from a height h above the ground. It hits the ground inelastically and bounces

Options

  1. AGiven below are two statements: one is labelled as Assertion A and the other is labelled as Reason R . Assertion A :
  2. BGiven below are two statements: one is labelled as Assertion A and the other is labelled as Reason R . Assertion A :
  3. CGiven below are two statements: one is labelled as Assertion A and the other is labelled as Reason R . Assertion A :
  4. DGiven below are two statements: one is labelled as Assertion A and the other is labelled as Reason R . Assertion A :

Correct answer

D. Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R . Assertion A :

Step-by-step solution

When a ball hits the ground vertically then some of its energy is lost due to which it bounces back to lesser height with less velocity. The energy of the ball keep on decreasing with time and finally it become zero. Due to this variation of velocity with height can be represented as follows : A ball is dropped vertically downwards from a height h above the ground. It hits the ground inelastically and bounces
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