11. There is a clever kitchen gadget for drying lettuce leavesafter you wash the

Question

11. There is a clever kitchen gadget for drying lettuce leavesafter you wash them. It consists of a cylindrical container mountedso that it can be rotated about its axis by turning a hand crank.The outer wall of the cylinder is perforated with small holes. Youput the wet leaves in the container and turn the crank to spin offthe water. The radius of the container is 12 cm. When the cylinderis rotating at 2 revolutions per second, what is the magnitude ofthe centripetal acceleration at the outer wall?
a. 4.8 m/s2
b. 19 m/s2
c. 27 m/s2
d. 9.8 m/s2
e. 6.0 m/s2

PLEASE EXPLAIN

Explanation / Answer

   Cantripetalacceleration         ac   =   r* 2       radius   r   =   12   cm                      =   0.12   m    angularspeed      =   2rev/s                                  =   2* 2 rad/s                                  =      12.56   rad/s    =>   ac   =   0.12* 12.562                   =   18.93   m/s2                   =   19   m/s2               b.19 m/s2
              b.19 m/s2

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