試題詳解

46. Two particles are confined to move along frictionless tracks as depicted in the figure on the right, where m₁ can only move along the horizontal track, and m₂ can only move along the vertical track. The two masses are connected by a rigid, massless rod of length Assume both masses are the same and are subject to gravity in the direction. With their initial positions indicated in the figure, which of the following statements is true?
(A) m₁ can never reach the right-hand side of the vertical track regardless of their initial velocities.
(B) m₂ can never reach a higher position than its initial position regardless of their initial velocities.
(C) If both masses are initially at rest, m₂ can never reach a higher position than its initial position.
(D) mi can reach the right-hand side of the vertical track only if it has an initial velocity in the direction.
(E) None of the above.