Last Updated On 16-03-2023 - By Jeesha Sara
A rod of length 50cm is pivoted at one end, It is raised such that if makes an angle of 30° from the horizontal as shown and released from rest. Its angular speed when it passes through the horizontal (in rad s−1 ) will be (g=10ms−2)
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Question ID - 50132 :- A rod of length 50cm is pivoted at one end, It is raised such that if makes an angle of 30° from the horizontal as shown and released from rest. Its angular speed when it passes through the horizontal (in rad s−1 ) will be (g=10ms−2)
a.
b.
c.
d.
A rod of length 50cm is pivoted at one end, It is raised such that if makes an angle of 30° from the horizontal as shown and released from rest. Its angular speed when it passes through the horizontal (in rad s−1 ) will be (g=10ms−2)
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a. |
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b. |
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c. |
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d. |
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Work done by gravity from initial to final position is,
W=mg
= 
According to work energy theorem
W=
=
=
rad/sec
∴ correct answer is (a)
Next Question :
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If the height of a triangle is decreased by 40% and its base is increased by 40%, what will be the effect on its area? |
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(a) |
No change |
(b) |
8% decrease |
(c) |
16% decrease |
(d) |
16% decrease |
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