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)
b)
c)
d)
Zero
’ 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 isa)
b)
c)
d)
Zero
Question ID - 100178 | SaraNextGen Top 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
127 votes
Answer Key / Explanation : (a) -
|
(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
|
speed of centre of ball)
upwards127 votes
Answer Link
127