NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Rotational Motion
NEET · Physics · Rotational Motion
Assertion A ring and a disc of same mass and radius begin to roll...
Assertion A ring and a disc of same mass and radius begin to roll without slipping from the top of an inclined surface at . The ring reaches the bottom of incline in time while the disc reaches the bottom in time , then .
Reason Disc will roll down the plane with more acceleration, because of its lesser value of moment of inertia.
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A).
- BBoth (A) and (R) are true and (R) is NOT the correct explanation of ((\mathrm{A})).
- C(A) is true but (R) is false.
- DBoth (A) and (R) are false.
Correct answer
D. Both (A) and (R) are false.
Step-by-step solution
(a=\frac{g \sin \theta}{1+\frac{I}{m R^2}})
Disc have lesser value of Inertia therefore have more acceleration.