Question

A particle is kept at rest at the top of a sphere of diameter $42$m. When disturbed slightly, it slides down. At what height 'h' from the bottom, the particle will leave the sphere?

• A. $14$m
• B. $28$m
• C. $35$m
• D. $7$m

Answer 1

Answer: (C)

$35$m

Diameter,$d=42m$

Radius,$r=21m$

Height,$h=\frac{2}{3}r=\frac{2}{3}\times 21=14m$

Therefore,$H=h+r=14+21=35m$