Homework Help: Physics

Posted by Don on Wednesday, November 7, 2012 at 11:31am.

Two banked curves have the same radius. Curve A is banked at an angle of 11°, and curve B is banked at an angle of 16°. A car can travel around curve A without relying on friction at a speed of 18.5 m/s. At what speed can this car travel around curve B without relying on friction?

Physics - Elena, Wednesday, November 7, 2012 at 2:33pm
tan α=ma₁/mg = (mv₁²/r)/mg= v₁²/rg
tan β=ma₂/mg = (mv₂²/r)/mg= v₂²/rg

tan α/ tan β= v₁²/v₂²
v₂ = v₁•sqrt(tan β/tan α)=18.5•sqrt(tan16/tan11)=
=22.47 m/s

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