1.

 A block of metal weighing 2 kg is resting on a frictionless plane. It is struck by a jet releasing water at a rate of 1 kg/sec and at a speed of 5 m/sec. The initial acceleration of the block will be                          [MNR 1979]

A.                       \[2.5\,m/{{\sec }^{2}}\]          
B.                           \[5.0\,m/{{\sec }^{2}}\]            
C.                         \[10\,m/{{\sec }^{2}}\]            
D.                           None of the above
Answer» B.                           \[5.0\,m/{{\sec }^{2}}\]            


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