0.5 kg pendulum bob is attached to a light string 1.0 m long. It is released from rest and swings from horizontal point A to vertical point B
At point B, it hits a 2.0 kg block, and the string is broken. Then the bob and block stick together, moving on a frictionless surface to point
C. If resistance is negligible and g=9.8m/s ^2 what is the velocity of the bob and block system at point C?
a) 4.4m/s
b) 6.2m/s
c) 8.7m/s
d) 11.0m/s