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A ferries wheel with radius 20 m which rotates counterclockwise, is just starting up. At a given moment, a passenger on the rim of the wheel and passing through the lowest point of his circular motion is moving at 3.00m/s and in gaining speed at a rate of 
.
Find the magnitude of the passenger's acceleration at the instant.
1 Answerstotal accleration =( Ac^2 + At^2)^1/2 (Ac,At are centripital and tangential accleration)
={(v^2/r)^2+ a^2}^1/2
v=3, a=0.5,r=20
after substituting these values
a=0.67 m/s^2
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