A solid sphere rests on a horizontal surface. A horizontal impulse is applied at height from centre. The sphere starts starts rolling just after the application of impulse. The ratio
will be
a) |
|
b) |
|
c) |
|
d) |
|
A solid sphere rests on a horizontal surface. A horizontal impulse is applied at height from centre. The sphere starts starts rolling just after the application of impulse. The ratio
will be
a) |
|
b) |
|
c) |
|
d) |
|
(b)
Rolling is rotation about point of contact. Applying impulse momentum equation about
…(i)
and …(ii)
As sphere rolls and
After solving, we get
In the figure shown, a small ball of mass ‘ ’ can move without sliding in a fixed semicircular track of radius
in a vertical plane. It is released from the top. The resultant force on the ball at the lowest point of the track is
a) |
|
b) |
|
c) |
|
d) |
Zero |
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