Solved exercise i.e., short questions of unit 4 rotational and circular motion. Their time codes have been mentioned as:
Time codes:
00:00 Intro
00:24 1) What is the value of angular acceleration of the minute hand of your wristwatch?
01:57 2) Define the following angular quantities: Displacement, velocity, acceleration.
03:17 3) Determine the relation between: (a)Linear and angular displacement (b)Linear and angular velocity (c) Linear and angular acceleration
06:51 4) Is centripetal force a fundamental force or a force provided by any of the fundamental forces? Can any combination of the fundamental forces provide centripetal force?
09:01 5) There are generally double tyres in heavy vehicles on one side of an axle. Will its moment of inertia be different from that of a single tyre?
11:28 6) Why is it best to have the blades rotate in opposite directions for a helicopter having two sets of lifting blades?
13:27 7) If the diameter of the Earth becomes half and there is no change in its mass, what effect will be there on the rotational speed of Earth around its own axis?
16:04 8) Why does in circular motion, a tangential acceleration can change the magnitude of the velocity but not its direction?
17:42 9) Why does the value of artificial gravity is usually smaller than 9.8 m/s²?
19:34 10) Why is gyroscope used in aero planes?
22:43 11) How the rotation of a flywheel helps to even out the power delivery from the engine?
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