A toboggan and rider, having a total mass of 150 kg, enter horizontally tangent to a 90¬∞ circular curve with a velocity VA and the angle of "descent," measured from the horizontal in a vertical x ‚Äî z plane, at which the toboggan exits at B. Neglect friction in the calculation. The radius rB equals 57 m.

A toboggan and rider, having a total mass of 150 kg, enter horizontal

1.	A toboggan and rider, having a total mass of 150 kg, enter horizontally tangent to a 90¬∞ circular curve with a velocity VA and the angle of "descent," measured from the horizontal in a vertical x ‚Äî z plane, at which the toboggan exits at B. Neglect friction in the calculation. The radius rB equals 57 m.
A.	vB = 21.9 m/s, = 20.9¬∞
B.	vB = 23.4 m/s, = 29.0¬∞
C.	vB = 20.7 m/s, = 8.84¬∞
D.	vB = 20.3 m/s, = 7.37¬∞
Answer» B. vB = 23.4 m/s, = 29.0¬∞

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