1.

A ball of weight 0.1 kg coming with speed 30 m/s strikes with a bat and returns in opposite direction with speed 40 m/s, then the impulse is (Taking final velocity as positive)            [AFMC 1997]

A.          \[-0.1\times (40)-0.1\times (30)\]                          
B.          \[0.1\times (40)-0.1\times (-30)\]
C.          \[0.1\times (40)+0.1\times (-30)\]                        
D.          \[0.1\times (40)-0.1\times (20)\]
Answer» C.          \[0.1\times (40)+0.1\times (-30)\]                        


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