Last Updated On [03-11-2023]
A disc is given an initial angular velocity 
and placed on a rough horizontal surface as shown Fig. The quantities which will not depend on the coefficient of friction is/are
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|
a) |
The time until rolling beings |
|
b) |
The displacement of the disc until rolling begins |
|
c) |
The velocity when rolling begins |
|
d) |
The work done by the force of friction |
Question ID - 100695 :- A disc is given an initial angular velocity and placed on a rough horizontal surface as shown Fig. The quantities which will not depend on the coefficient of friction is/are
a)
The time until rolling beings
b)
The displacement of the disc until rolling begins
c)
The velocity when rolling begins
d)
The work done by the force of friction
A disc is given an initial angular velocity and placed on a rough horizontal surface as shown Fig. The quantities which will not depend on the coefficient of friction is/are
|
a) |
The time until rolling beings |
|
b) |
The displacement of the disc until rolling begins |
|
c) |
The velocity when rolling begins |
|
d) |
The work done by the force of friction |
(c,d)
The velocity of the disc when rolling beings can be obtained using the conservation of angular momentum principle about the point through which the friction force acts. So, the coefficient of friction has no bearing on the final velocity. The work done by the force of friction will simply be changed to kinetic energy
Next Question :
Complete the following number/letter series by selecting one from the given choices.
|
2, 11, 38, ?, 362, 1091 |
|||||||
|
(a) |
119 |
(b) |
121 |
(c) |
133 |
(d) |
197 |
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