A metal sphere is a string fixed to a wall. The forces acting on the sphere are shown in figure. Which of following statements are correct. (a) T + N + W =0 (b) `T^(2)` =`N^(2)` +`W^(2)` (c) T=N+W (d) N=W tanθ

Options

A. a,b,c
B. b,c,d
C. a,b,d
D. a,b,c,d

Answer

C

Explanation

`T=costheta=W`
`T sin theta=R`
`tan theta=(R)/(W)`
`T^(2)=R^(2)+W^(2)`
also as for equilibrium `vecR+vecT+vecW=0`