(Solved): A section of track for a roller coaster consists of two circular arcs AB and CD joined by a straight ...

A section of track for a roller coaster consists of two circular arcs AB and CD joined by a straight portion \\( B C \\). The radius of \\( A B \\) is \\( 27 \\mathrm{~m} \\) and the radius of \\( C D \\) is \\( 72 \\mathrm{~m} \\). The car and its occupants, of total mass \\( 230-\\mathrm{Kg} \\) reach point A with practically no velocity and then drop freely along the track. Ignore air resistance and rolling resistance velocity at \\( B(\\mathrm{~m} / \\mathrm{s}) \\) ○. 13.47 b. 10.1 Cc. 8.42 d. 11.79 ○e. 3.37 normal reaction at \\( B \\) velocity at \\( D(\\mathrm{~m} / \\mathrm{s}) \\) a. 29.7 b. 35.64 Oc. 23.76 d. 41.58 Oe. 11.88 normal reaction at \\( \\mathrm{D}(\\mathrm{N}) \\) maximum velocity at \\( A \\) to loose contact at \\( B \\) a. 15.1 b. 12.58 c. 10.06 d. 7.55 e. 5.03