1. a race car drives one lap around a race track that is 500 meters in length.

a) Displacement = 0 ( as initial and final positions are equal )

b) Distance is 500 m but displacement is 0

Thus displacement is less than distance travelled

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.