Physics-
General
Easy

Question

Two masses A and B of mass M and 2M respectively are connected by a compressed ideal spring. The system is placed on a horizontal frictionless table and given a velocity ustack k with hat on top in the z-direction as shown in the figure. The spring is then released. In the subsequent motion the line from B to A always points along the stack i with hat on top unit vector. At some instant of time mass B has a x-component of velocity as V subscript x end subscript stack i with hat on top. The velocity stack V with rightwards arrow on top subscript A end subscript of as A at that instant is

  1. V subscript x end subscript stack i with hat on top plus u stack k with hat on top    
  2. negative V subscript x end subscript stack i with hat on top plus u stack k with hat on top    
  3. negative 2 V subscript x end subscript stack i with hat on top plus u stack k with hat on top    
  4. 2 V subscript x end subscript stack i with hat on top plus u stack k with hat on top    

The correct answer is: negative 2 V subscript x end subscript stack i with hat on top plus u stack k with hat on top

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