2.1 Definition of Vectors

Scalar vector refers to:

• a quantity that has both magnitude and direction.

• a number expresses quantity.

• an arrow to draw a vector.

• a direction in a space.

Which of the following refers to vector?

• mass

• temperature

• velocity

• acceleration

A car traveling at 60 km/hrs is a vector.

• True

• False

The box has a volume of 0.25m³ is a vector.

• True

• False

The room temperature is 37^oC is a scalar.

• True

• False

Which of the following zero vector properties is false?

• When a zero vector is added to another vector S, the result is the vector S.

• When a zero vector is multiplied by a non-zero scalar, the result is a scalar.

• When a vector multiply by zero, the result is zero vector.

• When a zero vector is subtracted from another vector K, the result is the vector K.

Answer explanation

When a zero vector is multiplied by a non-zero scalar, the result is a zero vector.

Two vectors U and V are said to be equal vectors when:

• They have same length and same directions.

• They have the same length and different directions.

• They have different length and same direction.

• They have different length and different direction.

Answer explanation

Two vectors U and V are said to be equal vectors when they have the same length and the same directions.

What is the position vector of point A?

A unit vector is a vector whose magnitude is unity, 1. True or False?

• True

• False

Which of the following is a vector quantity?

• Speed

• Temperature

• Distance

• Displacement