Case Study Questions for Class 9 Science Chapter 11 Work and Energy
In CBSE Class 9 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage based as well. In that, a paragraph will be given, and then questions based on it will be asked.
Here, we have provided case based/passage based questions for Class 9 Science Chapter 11 Work and Energy. Students can practice these questions for their exam.
Case Study/Passage Based Questions
Read the following and answer any four questions from (i) to (iii).
Figure shows a watch glass embedded in clay. A tiny spherical ball is placed at the edge B at a height h above the centre A.
(i) The kinetic energy of ball, when it reaches at point A is
(d) can’t say.
AnswerAnswer: (b) When the ball reaches at A, its entire potential energy will be converted into kinetic energy, since height is zero.
(ii) The ball comes to rest because of
(a) frictional force
(b) gravitational force
(c) both (a) and (b)
(d) none of these.
AnswerAnswer: (c) The forces which oppose the motion of ball are frictional and gravitational.
(iii) The energy possessed by ball at point C is
(a) potential energy
(b) kinetic energy
(c) both potential and kinetic energy
(d) heat energy.
AnswerAnswer: (a) The energy possessed by the ball at point C is potential energy, because of its height h from ground.
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Case study and passage based questions for other chapters of class 9 science is given below.
Chapter 3 Atoms and Molecules
Chapter 4 Structure of Atom
Chapter 10 Gravitation
Chapter 11 Work and Energy
Chapter 13 Why Do We Fall Ill?