Questions
One of the strings at end Q is cut at t = 0 and the rod starts rotating about the other end P. Then
a
At t = 0, angular acceleration of rod about P is 3g2L.
b
At t = 0, angular acceleration of rod about C.M. of rod is 3g2L.
c
At t = 0, acceleration of C.M. of rod is 3g4 in downward direction.
d
At t = 0, tension in the string at P is Mg4
detailed solution
Correct option is A
MgL2=ML23α∴ α=3g2L∴ acom=αL2=3g2LL2=3g4−T+Mg=M3g4∴ T=Mg4Talk to our academic expert!
Similar Questions
Assume body B to be uniform:
| Column-A | Column-B (Torque of normal reaction on body B about centre of mass) | ||
| (a) |  (F is directed towards| | (p) | Clockwise |
| (b) |  | (q) | Anticlockwise |
| (c) |  | (r) | Zero |
| (s) | Conclusion cannot be drawn with the information given | ||
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