Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Open MARKS Web Download App
Search any question & find its solution
Question: Answered & Verified by Expert

A disc is rotated about its axis with a certain angular velocity and lowered gently on a rough inclined plane as shown in the figure then

PhysicsRotational MotionNEET
Options:
  • A It will rotate at the position where it was placed and then will move downwards
  • B It will go downwards just after it is lowered
  • C It will go downwards first and then climb up
  • D It will climb upwards and then move downwards
Solution:
1000 Upvotes Verified Answer
The correct answer is: It will rotate at the position where it was placed and then will move downwards



Here kinetic friction force will balance the force of gravity. So it will rotate at its initial position and will not move up or down. As its angular velocity becomes zero (friction also becomes zero), it will move downwards.

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.

Use on iOS or Desktop Download from Google Play