A block of mass m moving with a velocity `v_(0)` on a smooth horizontal surface strikes and compresses a spring ofstiffuess k till mass coines to rest as shown in the figure. This phenomenon is observed by two observers : (a) Standing on the horizontal surface (b) standing on the block To an observer A, the work done by the normal reaction N between the block and the spring on the block is :A. zeroB. `- (1)/(2) mv_(0)^(2)`C. `+ (1)/(2) mv_(0)^(2-)`D. none of these

A block of mass m moving with a velocity `v_(0)` on a smooth horizonta

1.	A block of mass m moving with a velocity `v_(0)` on a smooth horizontal surface strikes and compresses a spring ofstiffuess k till mass coines to rest as shown in the figure. This phenomenon is observed by two observers : (a) Standing on the horizontal surface (b) standing on the block To an observer A, the work done by the normal reaction N between the block and the spring on the block is :A. zeroB. `- (1)/(2) mv_(0)^(2)`C. `+ (1)/(2) mv_(0)^(2-)`D. none of these
Answer» Correct Answer - B

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