Question

Which of the following is not the name of a physical quantity?

• A. Kilogram
• B. Mass
• C. Time
• D. Impulse

Answer 1

The correct option is A

Kilogram

Explanation for correct option:

In case of option A:

1. The kilogram, abbreviated kg, is the base unit of mass in the International System of Units.
2. A unit of force and mass, equal to the force that causes a mass of one kilogram to accelerate at 9.80665 meters per second per second.
3. There are only seven fundamental physical quantities, length, time, amount of substance, electric current, temperature, luminous intensity, and mass.
4. Kilogram is not a physical quantity.

Explanation for correct option:

In case of option B:

1. A physical body's mass is the amount of matter it contains.
2. It's also a measure of inertia, or resistance to acceleration, in the body.
3. SI unit of mass is the kilogram
4. There are only seven fundamental physical quantities, length, time, amount of substance, electric current, temperature, luminous intensity, and mass.
5. The mass of a body is a physical quantity.

In case of option C:

1. Time can be defined as the flow of events from the past through the present and into the future
2. SI Unit of time is a second.
3. There are only seven fundamental physical quantities, length, time, amount of substance, electric current, temperature, luminous intensity, and mass.
4. Time is one of a physical quantity.

In case of option D:

1. When an object receives an impulse, it experiences a vector change in its linear momentum.
2. SI unit of impulse is Newton-Second.
3. Dimensions of impulse is mass and length, so it is a physical quantity.
4. Impulse is a physical quantity.

Hence option A is correct.