Question 1

Which of the following is a scalar quantity?

Accepted Answer

Temperature

Question 2

A vector is defined as a quantity that has:

Accepted Answer

Both magnitude and direction

Question 3

Which of the following is the correct SI unit for momentum?

Accepted Answer

$$\mathrm{kg\cdot m/s}$$

Question 4

If a force of $$10\ \mathrm{N} is $$applied to a mass of $$2\ \mathrm{kg}$$, what is the acceleration produced?

Accepted Answer

$$5\ \mathrm{m/s^2$}$$

Question 5

Which equation correctly represents Newton's Second Law?

Accepted Answer

$$F = m \cdot a$$

Question 6

A vector of $$20\ \mathrm{N} is $$directed $$30^\circ$$ North of East. What is its horizontal (East) component?

Accepted Answer

$$20 \cdot \cos 30^\circ$$

Question 7

Which of the following is NOT a base SI unit?

Accepted Answer

Newton

Question 8

The vertical component of a vector $$V at $$angle $$	heta is $$given by:

Accepted Answer

$$V \cdot \sin 	heta$$

Question 9

Which of the following statements about scalar quantities is correct?

Accepted Answer

They have magnitude only.

Question 10

A car moves $$100\ \mathrm{m}$$ East, then $$80\ \mathrm{m}$$ South-East. Which vector best represents the total displacement?

Accepted Answer

The vector sum of $$100\ \mathrm{m}$$ East and $$80\ \mathrm{m}$$ South-East

Question 11

Which formula is used to find the magnitude of a vector given its components $$V_x$$ and $$V_y$$?

Accepted Answer

$$\sqrt{V_x^2$ + V_y^2$}$$

Question 12

If a vector $$A is$$ $$10\ \mathrm{N} at$$ $$60^\circ$$, what is its vertical component?

Accepted Answer

$$10 \cdot \sin 60^\circ$$

Question 13

Which of the following is a vector quantity?

Accepted Answer

Displacement

Question 14

The SI unit for force is:

Accepted Answer

$$\mathrm{N}$$

Question 15

Which operation is used to add two vectors graphically?

Accepted Answer

Place tail of second vector at head of first vector

Question 16

A vector $$V$$ has components $$V_x = 10\ \mathrm{N}$$ and $$V_y = 10\ \mathrm{N}. $$What is the magnitude of $$V$$?

Accepted Answer

$$\sqrt{10^2$ + 10^2$} = 14.14\ \mathrm{N}$$

Question 17

Which of the following is NOT a vector quantity?

Accepted Answer

Distance

Question 18

The process of breaking a vector into its horizontal and vertical components is called:

Accepted Answer

Vector resolution

Question 19

If $$\vec{A}$$ and $$\vec{B}$$ are vectors, which equation represents their sum?

Accepted Answer

$$\vec{A} + \vec{B}$$

Question 20

A vector $$V is$$ $$20\ \mathrm{N} at$$ $$30^\circ$$ North of East. What is its vertical (North) component?

Accepted Answer

$$20 \cdot \sin 30^\circ$$

Vectors, Scalars, and Basic Physics Quantities: Study Notes

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