- #1
Soaring Crane
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A ball is attached to a horizontal cord of length L whose other end is fixed.
a. If the ball is released what will be its speed at the lowest point of its path?
(1/2)mv^2 = mgr, or v^2 = 2gr, v = sqrt(2gr)?
b. A peg is located a distance h directly below the point of attachment of the cord. If h = 0.80 L, what will be the speed of the ball when it reaches the top of its circular path about the peg?
pic:
O_____L________o
+----------------|
-+---------------|
--+--------------|h
---+-------------|----+
----+------------*peg--+
------+----------|----+
---------+----+-O--+
+ = path of circular motion
O = ball
Any help to start is appreciated.
a. If the ball is released what will be its speed at the lowest point of its path?
(1/2)mv^2 = mgr, or v^2 = 2gr, v = sqrt(2gr)?
b. A peg is located a distance h directly below the point of attachment of the cord. If h = 0.80 L, what will be the speed of the ball when it reaches the top of its circular path about the peg?
pic:
O_____L________o
+----------------|
-+---------------|
--+--------------|h
---+-------------|----+
----+------------*peg--+
------+----------|----+
---------+----+-O--+
+ = path of circular motion
O = ball
Any help to start is appreciated.