Question
Question: Sixteen beads in a string are placed on a smooth incline as shown in equilibrium. The number of bead...
Sixteen beads in a string are placed on a smooth incline as shown in equilibrium. The number of beads lying along the incline are
A
4
B
8
C
12
D
None of these
Answer
12
Explanation
Solution
Let n beads be hanging vertically. Then (16 - n) mg sin θ = n mg. For sin θ =1/3, n = 4 ∴ 16 – 4 = 12 beads lie along the plane.