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
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a) |
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b) |
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c) |
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d) |
Zero |
Question ID - 100178 | SaraNextGen Answer 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
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 |
1 Answer - 5876 Votes
3537
Answer Key : (a) -
Answer Link|
(a) From conservation of energy, the kinetic energy of the ball at the lowest point is (
or Since the net tangential force on the sphere at the lowest point is zero, the net force on the sphere at the lowest position is
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speed of centre of ball)
upwards