Subject: Physics (chapter 3) Class: 9th Total Marks: 15
1)
Differentiate
between kinematics & dynamics. (2)
2) Write four applications of
rolling friction. (2)
3) On which principle do rockets and jet engines work? And How? (2)
4)
Define circular motion. What
is an isolated system? Also, write its example (3)
5) State and explain the law of
conservation of momentum. (6) (Board 2014)
