A ball of mass m is raised to height h and then dropped to the ground. When the ball has fallen half of the height, the velocity of the ball is (neglecting air resistance), where g is the acceleration due to gravity.

A ball of mass m is raised to height h and then dropped to the ground.

1.	A ball of mass m is raised to height h and then dropped to the ground. When the ball has fallen half of the height, the velocity of the ball is (neglecting air resistance), where g is the acceleration due to gravity.
A.	\(\sqrt {gh}\)
B.	\(\sqrt {2gh}\)
C.	\(\sqrt {gh/2}\)
D.	\(2\sqrt {gh}\)
Answer» B. \(\sqrt {2gh}\)

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A ball of mass m is raised to height h and then dropped to the ground. When the ball has fallen half of the height, the velocity of the ball is (neglecting air resistance), where g is the acceleration due to gravity.

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