Physcis problem?

Posted on 2016-03-04 19:05:00 in Physics by TIAN RONG

A stone at the end of a sling is whirled in a vertical circle of radius 1.40 m at a constant speed v0 = 2.20 m/s as in Figure P4.57. The center of the string is 1.50 m above the ground. 

(a) What is the range of the stone if it is released when the sling is inclined at 30.0° with the horizontal at A? 
(b) What is the range of the stone if it is released when the sling is inclined at 30.0° with the horizontal at B? 
(c) What is the acceleration of the stone just before it is released at A? 
Magnitude (absolute value)______ 
Direction(choose from below): 
(in the direction of v0 
downward 
toward the center of the circle 
upward) 
(d) What is the acceleration of the stone just after it is released at A? 
Magnitude (absolute value) _______ 
Direction(choose from below): 
(downward 
toward the center of the circle 
in the direction of v0 
upward)

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