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
Question 1:
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
(a) zero
(b) maximum
(c) minimum
(d) can’t say.
Answer
Answer: (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.
Answer
Answer: (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.
