Question 1

Which of the following best describes the main goal of physics as outlined in the study materials?

Accepted Answer

To construct theories that explain a wide variety of phenomena based on a few types of physical objects, plus the rules that govern these objects.

Question 2

Which of the following is NOT one of the four fundamental forces in nature?

Accepted Answer

Frictional force

Question 3

According to the Standard Model, which particle is responsible for mediating the electromagnetic force?

Accepted Answer

Photon

Question 4

Which prefix corresponds to a factor of $$10^{-6}$$?

Accepted Answer

micro

Question 5

If the size of a nucleus is approximately $$10^{-15} m $$and the size of the universe is about $$10^{26} m$$, what is the order of magnitude difference between these two lengths?

Accepted Answer

$$10^{41}$$

Question 6

Which of the following statements about significant figures is correct?

Accepted Answer

Significant figures reflect the precision of a measurement and only the digits that are known reliably are counted.

Question 7

Which equation correctly relates velocity ($$v$$), displacement ($$x$$), and time ($$t) $$for constant velocity motion?

Accepted Answer

$$x = v t$$

Question 8

A car accelerates from rest at a constant rate $$a$$ for a time $$t. $$What is the final velocity $$v of $$the car?

Accepted Answer

$$v = a t$$

Question 9

Which of the following is a derived unit in the SI system?

Accepted Answer

Newton

Question 10

Dimensional analysis can be used to check the validity of equations. Which of the following equations is dimensionally consistent?

Accepted Answer

$$x = v t$$

Question 11

The period $$T of a $$simple pendulum depends on its length $$L$$ and the acceleration due to gravity $$g. $$Which expression gives the correct dependence?

Accepted Answer

$$T = 2 \pi \sqrt{\frac{L}{g}}$$

Question 12

Which of the following best describes the scientific method as practiced during the Renaissance?

Accepted Answer

Observing, hypothesizing, experimenting, and analyzing results.

Question 13

Which of the following is NOT a base quantity in the SI system?

Accepted Answer

Velocity

Question 14

If a measurement is recorded as $$0.00450 m$$, how many significant figures does it have?

Accepted Answer

3

Question 15

Which of the following best explains why the ancient Greek model of matter had 'no predictive power'?

Accepted Answer

It could not be used to make testable predictions about natural phenomena.

Question 16

A student measures the time for a ball to fall and records $$0.52 s$$, $$0.50 s$$, and $$0.51 s. $$What is the average time, reported with the correct number of significant figures?

Accepted Answer

$$0.51 s$$

Question 17

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

Accepted Answer

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

Question 18

If the mass of an electron is approximately $$10^{-30} kg $$and the mass of the universe is about $$10^{53} kg$$, what is the order of magnitude difference between these two masses?

Accepted Answer

$$10^{83}$$

Question 19

Which of the following is a correct statement about the Standard Model of particle physics?

Accepted Answer

It includes quarks, leptons, and force-carrying bosons.

Question 20

A runner accelerates uniformly from rest and covers a distance $$d in $$time $$t. $$Which equation gives the acceleration $$a$$?

Accepted Answer

$$a = \frac{2d}{t^2$}$$

Units, Physical Quantities, and Kinematics in Physics: Foundational Concepts and Models

Guida di studio - Domande di pratica

Study guide - Flashcard