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Sample BAC Physics Practice Questions

Try these sample questions to review concepts for the BAC Physics exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A vehicle starts from rest and moves along a straight horizontal track with a constant acceleration of 2.5 m/s². What is the velocity of the vehicle after 4.0 seconds?
A.10.0 m/s
B.5.0 m/s
C.20.0 m/s
D.6.25 m/s
Explanation: In rectilinear motion with constant acceleration starting from rest (v0 = 0), velocity is given by v = a · t. Substituting a = 2.5 m/s² and t = 4.0 s yields v = 2.5 · 4.0 = 10.0 m/s. Therefore, the vehicle reaches 10.0 m/s at 4.0 seconds.
2A body starting from rest moves with a uniform rectilinear acceleration of 3.0 m/s². What total distance does it cover during the first 4.0 seconds of motion?
A.12.0 m
B.24.0 m
C.48.0 m
D.18.0 m
Explanation: The position formula for uniform accelerated motion from rest is d = (1/2) · a · t². Substituting a = 3.0 m/s² and t = 4.0 s gives d = 0.5 · 3.0 · 16 = 24.0 m. Hence, the total displacement over 4.0 seconds is 24.0 meters.
3A car travelling at an initial speed of 20 m/s brakes uniformly to a complete stop over a distance of 50 m. What is the magnitude of the deceleration during braking?
A.2.0 m/s²
B.8.0 m/s²
C.4.0 m/s²
D.5.0 m/s²
Explanation: Using Torricelli's equation v² - v0² = -2 · a · d with v = 0 gives 0 - 20² = -2 · a · 50. This simplifies to 400 = 100 · a, so the deceleration magnitude is a = 4.0 m/s². Thus, the car slows down at 4.0 m/s².
4A train covers the first half of a total distance at a constant speed of 40 km/h and the remaining half at a constant speed of 60 km/h. What is the average speed of the train over the entire distance?
A.50 km/h
B.48 km/h
C.45 km/h
D.52 km/h
Explanation: Average speed is total distance divided by total time: v_avg = d / (t1 + t2) = d / [d/(2·v1) + d/(2·v2)] = 2·v1·v2 / (v1 + v2). Substituting v1 = 40 km/h and v2 = 60 km/h gives v_avg = 2 · 40 · 60 / (40 + 60) = 4800 / 100 = 48 km/h. The harmonic mean must be used rather than the arithmetic mean.
5A small heavy sphere is dropped from rest from a height of h = 45 m above ground level. Neglecting air resistance and taking g = 10 m/s², how long does it take for the sphere to strike the ground?
A.4.5 s
B.3.0 s
C.2.5 s
D.9.0 s
Explanation: For free fall from rest under gravity, displacement is h = (1/2) · g · t². Solving for time gives t = √(2·h / g) = √(2 · 45 / 10) = √9 = 3.0 s. The sphere reaches the ground after exactly 3.0 seconds.
6A constant net horizontal force of F = 24 N is applied to a block of mass m = 4.0 kg resting on a frictionless horizontal plane. What is the acceleration acquired by the block?
A.6.0 m/s²
B.96.0 m/s²
C.0.167 m/s²
D.4.0 m/s²
Explanation: According to Newton's second law of motion, F_net = m · a. Rearranging gives a = F / m = 24 N / 4.0 kg = 6.0 m/s². The resulting acceleration of the block is 6.0 m/s².
7A crate of mass m = 5.0 kg is pulled horizontally along a flat floor at a constant velocity. If the coefficient of sliding friction between the crate and the floor is μ = 0.25 and g = 10 m/s², what horizontal pulling force is exerted?
A.50.0 N
B.20.0 N
C.12.5 N
D.2.5 N
Explanation: At constant velocity, acceleration is zero, so the applied horizontal force balances friction: F = F_f. The normal reaction on a horizontal surface is N = m · g = 5.0 · 10 = 50 N. Thus, F = μ · N = 0.25 · 50 = 12.5 N.
8A body of mass m = 2.0 kg is pulled across a rough horizontal floor by a horizontal force of F = 10.0 N. If the coefficient of sliding friction is μ = 0.20 and g = 10 m/s², what is the acceleration of the body?
A.5.0 m/s²
B.3.0 m/s²
C.2.0 m/s²
D.4.0 m/s²
Explanation: The friction force opposing motion is F_f = μ · m · g = 0.20 · 2.0 · 10 = 4.0 N. The net horizontal force is F_net = F - F_f = 10.0 - 4.0 = 6.0 N. Applying Newton's second law gives a = F_net / m = 6.0 / 2.0 = 3.0 m/s².
9A block of mass m = 4.0 kg slides down a frictionless inclined plane that makes an angle of α = 30° with the horizontal. Given g = 10 m/s² and sin 30° = 0.50, what is the acceleration of the block down the plane?
A.8.66 m/s²
B.5.0 m/s²
C.10.0 m/s²
D.2.5 m/s²
Explanation: On a frictionless inclined plane, the only force component along the incline is the tangential component of weight: G_t = m · g · sin α. By Newton's second law, m · a = m · g · sin α, so a = g · sin α = 10 · 0.50 = 5.0 m/s². The mass cancels out.
10A body slides down an inclined plane of inclination angle α = 30° (sin 30° = 0.50, cos 30° = √3 / 2 ≈ 0.866). If the coefficient of sliding friction is μ = 1 / (2·√3) ≈ 0.2887 and g = 10 m/s², what is the acceleration of the body?
A.2.5 m/s²
B.5.0 m/s²
C.3.5 m/s²
D.1.25 m/s²
Explanation: The equation of motion down the incline is m · a = m · g · sin α - μ · m · g · cos α. Factoring out g gives a = g · (sin α - μ · cos α). Here, μ · cos 30° = [1 / (2·√3)] · (√3 / 2) = 1/4 = 0.25. Therefore, a = 10 · (0.50 - 0.25) = 10 · 0.25 = 2.5 m/s².

About the BAC Physics Exam

Independent practice for Examenul Național de Bacalaureat, Fizică (Proba E.d). Independent English-language MCQ study adaptation. It is not an official translation, an official-format simulation, or a substitute for Romanian-language reading and writing, full worked solutions, or oral and practical preparation. Romanian is confirmed. Candidates who studied a subject in a minority language may request that language under the methodology; availability depends on the subject and route. Candidates choose two of four modules. This bank samples all four and includes real-profile content; check profile-specific exclusions and write full derivations.

Exam sponsor: Ministerul Educației și Cercetării / Centrul Național pentru Curriculum și Evaluare (CNCE). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Question count varies by module

Time Limit

180 minutes (3 hours)

Passing Score

At least 5/10 in every written paper and an overall written mean of at least 6/10, with required competence assessments completed or recognised. The methodology rounds an overall 5.99 to 6.00.

Exam / Certification Fees

First two Bacalaureat presentations are free; later presentations carry an annually set fee. A current later-attempt amount is not confirmed here.

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

Not officially weighted here

Mechanics and thermodynamics

Motion, forces, energy, momentum, ideal gases, thermal processes and engine cycles.

Not officially weighted here

Direct-current electricity

Circuits, Ohm and Kirchhoff laws, sources, power and efficiency.

Not officially weighted here

Optics

Geometrical and wave optics, and photoelectric effect where included in the applicable profile.

Preparing for the BAC Physics Exam

What You Need to Know

  • Passing score: At least 5/10 in every written paper and an overall written mean of at least 6/10, with required competence assessments completed or recognised. The methodology rounds an overall 5.99 to 6.00.
  • Assessment: Question count varies by module
  • Time limit: 180 minutes (3 hours)
  • Exam / certification fees: First two Bacalaureat presentations are free; later presentations carry an annually set fee. A current later-attempt amount is not confirmed here. Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

BAC Physics: Suggested Study Strategy

1Candidates choose two of four modules. This bank samples all four and includes real-profile content; check profile-specific exclusions and write full derivations.
2Use official papers and marking schemes for the applicable profile. Practise writing complete answers under the three-hour limit.
3Use the questions to identify gaps, then explain why each alternative fails without looking at the feedback.

Frequently Asked Questions

Is this the official examination format or an official translation?

Independent English-language MCQ study adaptation. It is not an official translation, an official-format simulation, or a substitute for Romanian-language reading and writing, full worked solutions, or oral and practical preparation.

What else does the full Bacalaureat require?

Other written papers and required competence assessments: Romanian oral communication, mother-tongue oral communication where applicable, a studied foreign language and digital competence. These must be completed or formally recognised. The subject bank does not replace them.

Which paper and language should I prepare for?

Romanian is confirmed. Candidates who studied a subject in a minority language may request that language under the methodology; availability depends on the subject and route. Candidates choose two of four modules. This bank samples all four and includes real-profile content; check profile-specific exclusions and write full derivations.