Question 1

Which of the following best describes the primary goal of physics as introduced in the study materials?

Accepted Answer

To fundamentally understand the universe around us through observation and analysis.

Question 2

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

Accepted Answer

Kilogram ($$kg)$$

Question 3

A car travels 3,000 kilometers. Convert this distance to meters.

Accepted Answer

$$3,000,000$$ meters

Question 4

Which of the following is NOT a fundamental SI unit as described in the study materials?

Accepted Answer

Joule ($$J)$$

Question 5

A runner moves with a constant speed of $$5\ \mathrm{m/s}$$ for $$10$$ seconds. What is the total distance covered?

Accepted Answer

$$50\ \mathrm{m}$$

Question 6

Which of the following best describes a vector quantity?

Accepted Answer

A quantity that has both magnitude and direction.

Question 7

If a car moves to the right at a constant velocity, which of the following statements is true?

Accepted Answer

The car's acceleration is zero.

Question 8

Which equation correctly relates velocity, displacement, and time for constant velocity motion?

Accepted Answer

$$v = \frac{\Delta x}{\Delta t}$$

Question 9

A cyclist starts at position $$x = 0$$ and travels east for $$100$$ meters, then west for $$40$$ meters. What is the cyclist's displacement?

Accepted Answer

$$60$$ meters east

Question 10

Which of the following is a correct statement about the difference between kinematics and dynamics?

Accepted Answer

Kinematics describes motion without regard to its causes, while dynamics deals with the forces causing motion.

Question 11

A student measures a time interval as $$45$$ minutes. Convert this to seconds.

Accepted Answer

$$2,700$$ seconds

Question 12

Which of the following is the correct vector addition rule for two vectors $$\vec{A}$$ and $$\vec{B} at $$the same angle?

Accepted Answer

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

Question 13

A car accelerates from rest at a constant rate of $$2\ \mathrm{m/s^2$}$$ for $$5$$ seconds. What is its final velocity?

Accepted Answer

$$10\ \mathrm{m/s}$$

Question 14

Which of the following is a correct conversion based on the study materials?

Accepted Answer

$$1\ \mathrm{kg} = 2.205\ \mathrm{lb}$$

Question 15

A physics student claims that a negative velocity always means the object is slowing down. Which of the following best evaluates this claim?

Accepted Answer

The claim is incorrect; negative velocity only indicates direction, not whether the object is speeding up or slowing down.

Question 16

A train moves at a constant speed of $$20\ \mathrm{m/s}$$ for $$3$$ minutes. What is the total distance traveled?

Accepted Answer

$$3,600\ \mathrm{m}$$

Question 17

Which of the following best describes the process of checking if your answer makes sense in physics problem-solving?

Accepted Answer

Comparing the answer to a reasonable estimate or order of magnitude.

Question 18

A car travels $$150$$ meters north, then $$100$$ meters east. What is the magnitude of the car's displacement?

Accepted Answer

$$\sqrt{150^2$ + 100^2$} = 180.28$$ meters

Question 19

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

Accepted Answer

Speed

Question 20

A physics problem asks for the order of magnitude estimate for the number of seconds in a year. Which of the following is the closest estimate?

Accepted Answer

$$10^7$$ seconds

Physics 181A: Introduction to Physics and Motion

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