1) What is meant by a scalar quantity?
Scalar is a quantity which is completely denoted only by magnitude with a unit (no direction). Examples are mass, time, speed, work, energy, density, etc.
2) What is meant by a vector quantity?
Vector is a quantity which has both direction and magnitude. Examples are velocity, displacement, acceleration, weight, force, torque, magnetic field, electric field, momentum, etc.
3) Define unit vector
A unit vector is a vector whose value is unity ‘1’. It basically shows the direction.
4) Define the null vector.
A null vector is a type of vector that has zero magnitudes and is directionless.
5) Define the position vector.
A position is stated as a vector that represents either the location or position of any point relative to any reference point, such as origin.
6) What is meant by the resolution of vectors?
The resolution of vectors is the splitting of a single vector into multiple vectors.
7) What is meant by the components of a vector?
Generally, there are three vector components, which are along the z-axis, y-axis, and x-axis, respectively.
8) Explain rectangular components.
The vector components that are at right angles to each other are known as rectangular components.
9) What is the difference between a thanks vector and a position vector?
A null vector is a vector that has zero magnitudes. It may or may not possess a direction. On the other hand, a position vector is a vector that represents a point’s position relative to the origin of the axes.
10) Define the negative of a vector.
A negative of a vector denotes the direction opposite to the available direction. In other words, the magnitudes of the two vectors are the same and opposite in direction.
11) Explain the parallelogram law of vector addition.
It can be stated that if two vectors are fully denoted by a parallelogram’s two adjacent sides, then the parallelogram’s diagonal from the two vectors’ tails give their final resultant vector.
12) What is meant by a scalar product?
When the multiplication of two vectors is a scalar value, then it is known as the dot product or scalar product. For example, work is a scalar product of force and displacement.
13) What are the units of force?
The force is calculated in Newton (MKS) or in pound (BE), or in dyne (CGS).
14) State Pythagoras’ theorem.
Pythagoras’ theorem is defined as the square of the hypotenuse of a triangle (with a right angle) that is equivalent in area to the sum of the squares of the other two individual sides.
14) Explain vector product.
Suppose the product of two vectors resulted in a vector quantity, then it is known as a cross-product or a cross product.
15) How can a vector be multiplied by numerical values?
When vectors are multiplied by positive numbers, their magnitudes change, but directions stay the same. But when vectors are multiplied by negative numbers, both their magnitudes and directions change. More precisely, the directions get reversed.
Also Read:
- To find the weight of a given body using parallelogram law of vectors.
- Chapter Wise Physics Class 11 MCQs
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