1.

A motor car moving with a uniform speed of \[20\,m/\sec \] comes to stop on the application of brakes after travelling a distance of\[10\,m\] Its acceleration is           [EAMCET 1979]

A.             \[20\,m/{{\sec }^{2}}\]        
B.             \[-20m/{{\sec }^{2}}\]
C.             \[-40\,\,m/{{\sec }^{2}}\]     
D.             \[+2m/{{\sec }^{2}}\]
Answer» C.             \[-40\,\,m/{{\sec }^{2}}\]     


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