A Horizontal Curve on a Bobsled Run Is Banked at a 45°

Multiple Choice

A horizontal curve on a bobsled run is banked at a 45° angle. When a bobsled rounds this curve at the curve's safe speed (no friction needed to stay on the run) , what is its centripetal acceleration?

A) g /

B) 0.5 g
C) 2.0 g
D) g
E) 1.0 g