Physics - Unit 1 D cont. 1/21

Front

What is a scalar?

Back

A scalar is a quantity that has magnitude only and no direction.

Front

What is the resultant of two or more vectors?

Back

The resultant is the sum of the vectors.

Front

Define magnitude in the context of physics.

Back

Magnitude refers to the size or quantity of a physical property, such as length, mass, or speed, without regard to its direction.

Front

What is a vector?

Back

A vector is a quantity that has both magnitude and direction.

Front

What is the difference between scalar and vector quantities?

Back

Scalar quantities have only magnitude (e.g., temperature, mass), while vector quantities have both magnitude and direction (e.g., velocity, force).

Front

What is the formula for calculating the resultant of two vectors at an angle?

Back

The resultant R can be calculated using R = √(A² + B² + 2AB cos(θ), where A and B are the magnitudes of the vectors and θ is the angle between them.

Front

What is the significance of direction in vector quantities?

Back

Direction is crucial in vector quantities as it determines how the vector interacts with other vectors and affects the resultant.

Front

Give an example of a scalar quantity.

Back

An example of a scalar quantity is temperature, which is measured in degrees but does not have a direction.

Front

Give an example of a vector quantity.

Back

An example of a vector quantity is velocity, which includes both speed and direction.

Front

What is the graphical representation of vectors?

Back

Vectors are often represented graphically by arrows, where the length of the arrow indicates the magnitude and the direction of the arrow indicates the direction of the vector.