question_answer

A ladder is more apt to slip when you are high up on its rung than when you are just begin to climb. Why?

A)  When you are high up, the moment offered tending to rotate the ladder about its base increase, while in the latter case, the moment of inertia is insufficient to cause slipping.

B)  When you are high up, the ladder is in unstable, equilibrium

C)  As you climb up, your potential energy increases

D)  When you are high up, the centre of gravity of the system shifts upwards so the ladder is unstable, while in the latter case the system is more stable