A boy of mass 50kg is standing on a frictionless surface. He throws a – McqOptions

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1.	A boy of mass 50kg is standing on a frictionless surface. He throws a ball of mass 2kg away from him with a speed of 10m/s. Find the final speed of the centre of mass.
A.	0m/s
B.	20m/s
C.	10m/s
D.	0.4m/s
Answer» B. 20m/s

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