A 1.6-kg ball is attached to the end of a 0.40-m string to form a pendulum. This pendulum is released from rest with the string horizontal. At the lowest point of its swing, when it is moving horizontally, the ball collides with a 0.80-kg block initially at rest on a horizontal frictionless surface. The speed of the block just after the collision is 3.0 m/s. What is the speed of the ball just after the collision?
A. 1.7 m/s
B. 1.1 m/s
C. 1.5 m/s
D. 1.3 m/s
E. 2.1 m/s
Answer: D
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