Vectors

A vector has how many components?

• one
• two
• three
• four

What is a unit vector?

• a vector of length zero
• a vector that has the same direction as the original vector
• a vector that has a length of one
• a vector that points in the opposite direction of the original vector

Which of these is not a vector quantity?

• mass
• velocity
• displacement
• temperature

What is vector addition?

• the sum of two vectors of different magnitudes and directions
• the sum of two vectors of the same magnitude and direction
• the difference between two vectors of the same magnitude and direction
• the difference between two vectors of different magnitudes and directions

What is the dot product?

• the product of two vectors' magnitudes
• the product of two vectors' directions
• the product of the magnitudes of two vectors and the cosine of the angle between them
• the product of the magnitudes of two vectors and the sine of the angle between them

What is the cross product?

• the product of two vectors' magnitudes
• the product of two vectors' directions
• the product of the magnitudes of two vectors and the cosine of the angle between them
• the vector product of two vectors, which is a vector perpendicular to both of them with magnitude equal to the product of their magnitudes and the sine of the angle between them

Write the vector from A to B...

• a

• -a

• b

• -b

The physical quantities that follow simple laws of algebra are called ....................... physical quantities

• Tensor

• vector

• scalar

• None

After completing one trip on a roller coaster, the roller coaster's ________ is zero.

• displacement

• reference point

• length

• distance

A person walks 50 meters directly north, stops, and then travels 32 meters directly south.  What is their displacement?

• 82 meters
• 18 meters
• 28 meters