A 2 m long ladder rests against a wall and makes an angle of 30° with the horizontal floor. Where will be the instantaneous center of rotation when the ladder starts slipping ? i. 1.0 in from the wall ii. 1.732 m from the wall iii. 1.0 m above the floor iv. 1.732 m above the floor The correct answer is

• A. (i) and (iii)
• B. (ii) and (iv)
• C. (ii) and (iii)
• D. (i) and (iv)

Answer: (B)