Hi, Please, can you explain step by step. Thank You Questions 18 through 23 are

Question

Hi,
Please, can you explain step by step. Thank You Questions 18 through 23 are concerned with a 1.6 kg mass which slides down a long chute and goes around a circular track one loop before going up a ramp. When it leaves the ramp at E it becomes a projectile. All the surfaces are frictionless. The speed of the mass at B, the bottom of the track is 13.0 m/s. The magnitude of the centripetal acceleration at the bottom of the track is (A) 4.3 m/s2 (B) 56.3 m/s2 (C) 9.8 m/s2 (D) 15.7 m/s2 (E) 28.7 m/s2 .What force does the track exert on the mass When it is at the bottom of the track? (point B) (A) 106 N (B) 15.7 N (C) 90.1 N (D) 74.4 N (E) 62.4 N What is the speed of the mass when it reaches point A? (A) 13 m/s (B) 3.2 m/s (C) 7.17 m/s (D) 6.5 m/s (E) 10.5 m/s

Explanation / Answer

The centripetal acceleration at the point B is              aB = vB2 /R                                  = (13.0m/s)2 / (3.0m)                   = 56.3 m/s2 (b) The force exerted on the body at the point B is              F = maB = (1.6kg)(56.3m/s2) = 90.1 N

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