A block is released from rest at the top of a fixed, frictionless ramp with horizontal length L and inclination \theta.
For a fixed value of L, which value of \theta minimizes the time needed for the block to reach the bottom of the ramp?"
Answer Choices
A. 30^{\circ}
B. 45^{\circ} \leftarrow CORRECT
C. 60^{\circ}
D. 75^{\circ}
E. 80^{\circ}
