Lydia Antol MATH241 PLT Session 1

Which of these quantities is a VECTOR quantity?

• 2

• -2 meters per second

• -6 kilograms

• 22 hamburgers

Which of these quantities is a SCALAR

• 22 meters per second

• 2 newtons(force unit) in the downward direction

• 4 hamburgers

• 60 miles per hour

A vector can have a magnitude of 0

• True
• False

An example of a unit vector is...

• <1, 1, 1>

• <0, 0, 0>

• <1, 0, 0>

• <3, 0, 1>

What is the magnitude of the vector <3, 2, 1>

• sqrt(20)
• sqrt(14)
• sqrt(10)
• sqrt(5)

Write the vector <1, -5, 0> using the standard unit vectors i, j, k

• 2i - 5j + k
• 1i - 5j + 0k

• -1i + 5j + 0k
• i - 5j

The physical quantities having only magnitude but no direction are said to be .................. quantities

• Scalar

• vector

• Tensor

• Unit

The vectors i, j, and k are examples of unit vectors

• True
• False

ANY vector in R3 (3 dimensions, including x, y, and z) can be created by adding or subtracting scalar multiples of the unit vectors i, j, k

• True
• False

What is the vector formed by connecting points P=(0, 4, 9) and Q=(1, 2, 12)