Q: A student calculates the momentum $$p of a$$ $$0.5 \ \mathrm{kg}$$ ball moving at $$4 \ \mathrm{m/s}. $$What is the correct value and formula?

$$p = mv = 0.5 \times 4 = 2 \ \mathrm{kg\ m/s}$$

Question 1

Which of the following best describes the nature of science (NOS) as outlined in the IB Physics guide?

Accepted Answer

Science is a process of inquiry that involves observation, experimentation, and the development of models and theories.

Question 2

A student is designing an experiment to measure the acceleration due to gravity using a pendulum. Which skill from the IB Physics guide's inquiry process is MOST relevant at this stage?

Accepted Answer

Designing the experimental setup and identifying variables.

Question 3

Which equation from the IB Physics guide would you use to calculate the final velocity $$v of an $$object under constant acceleration $$a$$ after time $$t$$, starting from initial velocity $$u$$?

Accepted Answer

$$v = u + at$$

Question 4

In the context of the IB learner profile, which attribute is MOST directly developed by engaging in collaborative science projects?

Accepted Answer

Communicator

Question 5

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

Accepted Answer

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

Question 6

Which of the following is a key difference between the Theory of Knowledge (TOK) and the Nature of Science (NOS) as described in the IB Physics guide?

Accepted Answer

NOS is specific to science and emphasizes the scientific method, while TOK is interdisciplinary and explores the nature of knowledge across subjects.

Question 7

A student measures the temperature of a substance and records $$25.0 \ ^\circ\mathrm{C}$$, $$25.2 \ ^\circ\mathrm{C}$$, and $$24.9 \ ^\circ\mathrm{C}. $$Which aspect of measurement is MOST important to consider when reporting the final result?

Accepted Answer

The average value and the uncertainty.

Question 8

Which formula from the IB Physics guide expresses the work $$W$$ done by a constant force $$F$$ acting over a displacement $$d at an $$angle $$	heta to $$the direction of the force?

Accepted Answer

$$W = Fd \cos 	heta$$

Question 9

Which of the following best illustrates the impact of scientific knowledge on society, as described in the IB Physics guide?

Accepted Answer

Scientific knowledge can lead to technological innovations that improve quality of life.

Question 10

A student is asked to calculate the kinetic energy $$E_k of a$$ $$2 \ \mathrm{kg}$$ object moving at $$3 \ \mathrm{m/s}. $$Which formula should be used?

Accepted Answer

$$E_k = \frac{1}{2}mv^2$

Question 11

Which of the following is an example of a falsifiable hypothesis in physics?

Accepted Answer

All objects fall at the same rate in a vacuum.

Question 12

According to the IB Physics guide, which skill is MOST important when drawing and interpreting free-body diagrams?

Accepted Answer

Thinking skill

Question 13

A student calculates the momentum $$p of a$$ $$0.5 \ \mathrm{kg}$$ ball moving at $$4 \ \mathrm{m/s}. $$What is the correct value and formula?

Accepted Answer

$$p = mv = 0.5 	imes 4 = 2 \ \mathrm{kg\ m/s}$$

Question 14

Which of the following is a guiding question for the study of kinematics in the IB Physics guide?

Accepted Answer

How can the motion of a body be described quantitatively and qualitatively?

Question 15

Which equation from the IB Physics guide describes the relationship between displacement $$s$$, initial velocity $$u$$, acceleration $$a$$, and time $$t$$?

Accepted Answer

$$s = ut + \frac{1}{2}at^2$

Question 16

In the IB Physics guide, which aspect of the scientific endeavour is MOST emphasized when students analyze patterns and trends in experimental data?

Accepted Answer

Formulating hypotheses and models.

Question 17

A student is asked to evaluate the ethical implications of nuclear power generation. Which aim of the IB Physics course does this MOST directly address?

Accepted Answer

Developing awareness of the ethical, environmental, economic, cultural and social impact of science.

Question 18

Which formula from the IB Physics guide gives the average kinetic energy $$E_{k,avg} of a $$particle in terms of temperature $$T$$?

Accepted Answer

$$E_{k,avg} = \frac{3}{2}kT$$

Question 19

Which of the following is a recommended approach to teaching physics according to the IB Physics guide?

Accepted Answer

Encouraging conceptual understanding and linking concepts across topics.

IB Physics Guide: Core Concepts, Nature of Science, and Syllabus Structure

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