Scalars, Vectors, and Velocity

Scalars and Vectors

by Mr. Castillo

scalars vs vectors

https://www.youtube.com/watch?v=R8m9VJfwYrc

Scalars

• They have magnitude

• Do not have direction

• Speed, distance, mass, time ,volume, temperature

Vectors

• Have magnitude ( number follow by a unit)

• velocity ( speed with direction)

• Displacement ( distance with direction)

• Force, acceleration

Scalars vs Vectors

Multiple Choice

A scalar quantity has . . .

• magnitude only

• direction only

• both magnitude and direction

• neither

Multiple Choice

A vector quantity has . . .

• magnitude only

• direction only

• both magnitude and direction

• neither

Multiple Choice

Which quantity do we use an arrow to represent?

• scalars

• vectors

Multiple Choice

Temperature is an example of a

• scalar

• vector

Multiple Choice

Acceleration is an example of a

• scalar

• vector

Multiple Choice

Time is an example of a

• scalar

• vector

Multiple Choice

Which of the following is a scalar quantity?

• distance

• displacement

Multiple Choice

Which of the following is a vector quantity?

• distance

• displacement

Multiple Choice

Wind blowing at 20 mph.Vector or scalar?

• Scalar

• Vector

Multiple Choice

The students are arguing over the differences between speed and velocity. One student says, “Speed is a vector because it describes how fast an object traveling. Velocity is a scalar because it tells how fast and what direction an object is traveling.” Which of the following statements is correct?

• The students' understanding of all four terms (speed, velocity, scalar, and vector) is correct.

• The students' understanding of all four terms (speed, velocity, scalar, and vector) is incorrect.

• The students' understanding of speed and velocity is incorrect but their

  understanding of scalar and vector is correct.

• The students’ understanding of speed and velocity is correct but their understanding of scalar and vector is incorrect.

Multiple Choice

30 m/sec, East. Scalar or Vector

• Scalar
• Vector
• Neither

Multiple Choice

A deer running 15 meters per second due west.Vector or scalar?

• Scalar
• Vector

Multiple Choice

Distance and direction of an object's change in position from a starting point

• displacement
• distance
• motion
• reference point

Multiple Choice

 Amy runs 2 miles south, then turns around and runs 3 miles north. What is displacement?

• 5 miles
• 1 mile 
• 2 miles south
• 1 mile north 

Multiple Choice

The _______ of two or more vectors is the sum of the vectors.

• components
• scalar
• resultant
• magnitude

Multiple Choice

Which symbol is used to show vector quantities?

• Circle
• Line
• Arrow
• Triangle

Multiple Choice

Sara walks from Point A to Point B. Which is true?

• Distance and displacement are EQUAL
• Distance is less than displacement

Multiple Choice

Find the distance Sara walks from A to B,  B to C then C to D?

• 11m
• 3m
• 5m

Multiple Choice

Michael walks in the following order: from Point A, to Point B, and finally to Point C. Which is true?

• Distance and displacement are EQUAL

• Distance is less than displacement

• Displacement is less than distance.

Multiple Choice

Juan walks in the following order: from Point A, to Point B, to Point C, and stops at Point D. Which is true?

• Distance and displacement are EQUAL

• Distance is less than displacement

• Displacement is less than distance.

Multiple Choice

Which driver has an equal distance and displacement at B?

• 1

• 2

• 3

Multiple Choice

Scott travels north 5 miles and then goes west 3 miles before coming straight back south 2 miles. What is his distance?

• 10 miles
• 7 miles
• 8 miles
• 6 miles

Multiple Choice

 Ray runs 30 feet north, 30 feet west, and then 30 feet south. What is the displacement?

• 30 feet west
• 90 feet 
• 30 feet south
• 0 feet

Multiple Choice

A quantity that has both magnitude and direction is called a scalar quantity.

• True
• False

Multiple Choice

Another word for "size" is...

• magnification

• magnetism

• magnitude

• magnanimity

Multiple Select

Select the scalar quantities.

• velocity

• distance

• energy

• acceleration

• speed

Multiple Select

Two cars are travelling at 10 m/s, in different directions. Select the sentences that are true.

• Their speeds are the same.

• Their speeds are different.

• Their velocities are the same.

• Their velocities are different.

Multiple Choice

An example of scalar magnitude:

• velocity

• mass

• acceleration

• force

Multiple Choice

This is speed in a specific direction.

• Velocity

• Motion

• Position

Multiple Choice

A car travels 90 meters due north in 15 seconds. Then the car turns around and travels 40 meters due south.  What is the magnitude and direction  of the car's resultant displacement?  

• 40 metres, South

• 50 metres, South

• 50 metres, North

• 40 metres, North 

Multiple Choice

Which statement describes a vector?

• It has magnitude but no direction

• It has direction but no magnitude

• It has both direction and magnitude

• It has constant magnitude but no  direction

Multiple Choice

Is this a scalar quantity or a vector quantity? A deer running 15 meters per second due west

• Scalar

• Vector

Multiple Choice

If a boomerang is thrown 20 m in a straight line and returns exactly to the spot it was thrown what is its displacement?

• 20m

• 40m

• 0m

• -20m

Multiple Choice

What is the SI unit of measurement for force?

• lbf

• Kilograms

• Newtons

• m/sec^2

Multiple Choice

What is the net force? 100 N        230 N <------        --------->

• 30 N to the right

• 230 N to the right

• 130 N to the right

• This is a balanced force

Multiple Choice

A car moved 60 km East and 90 km West. What is the displacement and the direction?

• 30 km, West

• 60 km. East

• 90 km

• 150 km