A ball of mass 1.0 kg is tied to a string and allowed to revolve in a vertical circle of radius 1.5 m. If the ball's speed at the top of the trajectory is 2.3 m/s, its speed at the bottom of the trajectory is
A) 0 m/s.
B) 2.3 m/s.
C) 5.9 m/s.
D) 7.7 m/s.
E) 8.0 m/s.

Question

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The Answer of A ball of mass 1.0 kg is tied to a string and allowed to revolve in a vertical circle of radius 1.5 m. If the ball's speed at the top of the trajectory is 2.3 m/s, its speed at the bottom of the trajectory is
A) 0 m/s.
B) 2.3 m/s.
C) 5.9 m/s.
D) 7.7 m/s.
E) 8.0 m/s.

A Ball of Mass 1