Scalars, Vector,Displacement,Speed and Velocity

What is a scalar quantity?

• A) A quantity that has both magnitude and direction

• B) A quantity that has magnitude but no direction

• C) A quantity that has direction but no magnitude

• D) A quantity that has neither magnitude nor direction

Answer explanation

A scalar quantity is defined as one that has magnitude but no direction. Therefore, the correct choice is B, as it accurately describes a scalar, unlike the other options which refer to vector quantities or lack both attributes.

Tags

NGSS.MS-PS3-2

Which of the following is NOT a scalar quantity?

• Length

• Mass

• Area

• Force

Answer explanation

Force is a vector quantity, as it has both magnitude and direction. In contrast, length, mass, and area are scalar quantities, which only have magnitude.

Tags

NGSS.MS-PS3-1

Fill in the blank: Scalar quantities include Length, Mass, Area, Volume, and _________.

• Temperature

• Force

• Velocity

• Acceleration

Answer explanation

Scalar quantities are defined by magnitude only, without direction. Temperature is a scalar quantity, while Force, Velocity, and Acceleration are vector quantities, which include direction.

Tags

NGSS.MS-PS3-4

Which of the following is an example of a scalar quantity?

• 28 meters

• 10 meters North

• 5 m/s East

• 20 Newtons to the right

Answer explanation

A scalar quantity has only magnitude, not direction. '28 meters' is a scalar as it only indicates distance. The other options include directional components, making them vector quantities.

Fill in the blank: 100 ______ is an example of a scalar quantity.

• Liters

• Newtons

• Meters per second North

• Joules per Kelvin

Answer explanation

100 Liters is a scalar quantity because it has only magnitude (volume) and no direction. In contrast, Newtons (force) and Meters per second North (velocity) include directional components, while Joules per Kelvin involves multiple quantities.

Which of the following represents a scalar quantity?

• 66 Kg

• 66 Kg North

• 66 Kg upward

• 66 Kg at 30 degrees

Answer explanation

A scalar quantity has only magnitude, while the other options include direction. '66 Kg' is a scalar, representing mass without direction, making it the correct choice.

Fill in the blank: A vector is a quantity that has _______ and magnitude.

• direction

• speed

• mass

• volume

Answer explanation

A vector is defined as a quantity that has both direction and magnitude. Among the answer choices, 'direction' is the correct term that completes the statement, as speed, mass, and volume do not pertain to vectors.

Which of the following is a vector quantity?

• Displacement

• Mass

• Temperature

• Time

Answer explanation

Displacement is a vector quantity because it has both magnitude and direction, indicating how far and in which direction an object has moved. In contrast, mass, temperature, and time are scalar quantities, having only magnitude.

Which of the following is a vector quantity?

• Direction

• Energy

• Volume

• Pressure

Answer explanation

Direction is a vector quantity because it has both magnitude and direction. In contrast, energy, volume, and pressure are scalar quantities, which only have magnitude.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Which of the following is a vector quantity?

• Acceleration

• Area

• Density

• Length

Answer explanation

Acceleration is a vector quantity because it has both magnitude and direction. In contrast, area, density, and length are scalar quantities, which only have magnitude.

Tags

NGSS.MS-PS2-5