Question

The number of non-zero rows in an echelon form is called

Answer 1

Step-by-step explanation:

Question text

A 600-g ball A is moving with a velocity of magnitude 5 m/s when it is hit by a 1-kg ball B as shown which has a velocity of magnitude 3 m/s. Knowing that the coefficient of restitution is 0.7 and assuming no friction, determine the following:

Answer 2

The number of non-zero rows in an echelon form is called the rank of a matrix.

• When all the elements in a row are zeros, it is called a zero row. If the row has at least one non-zero element, then it is a non-zero row.

• A matrix is said to be in echelon form if:

1. The leading element of each row is 1.
2. All the entries below this 1 must be zeros.
3. A row containing more number of zeros should appear below the order.

• The number of non-zero rows in a row reduced to echelon form is called the rank of the matrix.