Question

The force exerted by the ideal string on the ideal pulley P is –

• A. mg
• B. 2 mg
• C. $\sqrt { 2 }$ mg
• D. 4 mg

Answer 1

Answer: (A)

mg

Answer 2

As T = mg and for pulley P

T_Net = $\sqrt { \mathrm { T } ^ { 2 } + \mathrm { T } ^ { 2 } + \text { 2.T.T. } \cos 120 ^ { \circ } }$ = T = mg.