The 2025 PhysicsBowl kept its signature style: friendly calculations with a steady mix of concepts and estimation, led by mechanics and electromagnetism. Scan the QR code for the complete 2025 paper, answer key and step-by-step solutions, then drill with the 25 original questions on this page.
The 25 online practice questions start instantly; the full past-paper & answers PDF is available free from an advisor via the QR code — it is not a direct download on this page.2025 Physics Bowl paper overview and exam highlights.
The 2025 PhysicsBowl, organized by the American Association of Physics Teachers (AAPT), followed the usual calendar: the exam takes place in spring (around late March to early April) each year, with registration deadlines per the official announcement. The format stayed unchanged: 40 multiple-choice questions in 45 minutes, entirely in English, calculators allowed, points for correct answers and no penalty for wrong ones.
The Division 1 / Division 2 structure continued: Division 1 for first-year and beginning physics students (no calculus), Division 2 for second-year and AP Physics C students, ranked and awarded separately with no double entry. The paper leaned on mechanics and electromagnetism, kept thermodynamics and gas-law items approachable, retained a conceptual flavor in waves and optics, and covered its usual modern-physics staples such as the photoelectric effect and introductory relativity.
Want to master the 2025 paper question by question? Scan the QR code for the full exam, reference answers and detailed solutions, then use the 25 original practice questions on this page to close the gaps topic by topic.
2025 Physics Bowl main topic areas, weights and emphasis.
About 42%: kinematics, Newton laws and energy-momentum form the backbone and the main scoring area.
About 23%: fields and circuits carry equal weight, with induction often saved for the final problems.
About 14%: reflection, refraction and interference alternate, mostly as concept items.
About 10%: specific heat and the ideal gas law make this the friendliest section.
About 11%: the photoelectric effect and basic relativity appear reliably.
2025 Physics Bowl-style mock questions (Basic · Medium · Hard) — submit to grade and view step-by-step solutions.
A cyclist rides at a steady 8 m/s for 25 s. What distance does the cyclist cover?
Correct answer: E
Uniform motion: s = vt = 8 × 25 = 200 m. Choice C corresponds to only 5 s of riding and B to 20 s. Core: distance = speed × time.A net force of 60 N acts on a 12 kg cart. What is its acceleration in m/s2?
Correct answer: A
Newton second law: a = F/m = 60/12 = 5 m/s2. Choice B inverts the formula (m/F) and E multiplies force by mass. Core: acceleration = net force divided by mass.What is the weight of a 25 kg suitcase at the surface of Earth? (g = 9.8 m/s2)
Correct answer: D
Weight W = mg = 25 × 9.8 = 245 N. Choice C uses the rough g = 10 approximation and B divides by g instead of multiplying. Core: weight = mass × gravitational acceleration.A 12 V source is connected across a 240 Ω resistor. How much current flows through it?
Correct answer: B
From I = V/R = 12/240 = 0.05 A. Choice A shifts the decimal point and D divides resistance by voltage. Core: current = voltage divided by resistance.Three resistors of 10 Ω, 20 Ω and 30 Ω are connected in series. What is the total resistance?
Correct answer: C
In series the resistances add: R = 10 + 20 + 30 = 60 Ω. Choice A treats them as parallel (about 5.5 Ω) and B takes the average. Core: series resistances simply add.How much heat is needed to warm 2 kg of water from 20 ℃ to 30 ℃? (specific heat of water c = 4200 J/(kg·℃))
Correct answer: E
Q = mcΔT = 2 × 4200 × 10 = 84000 J = 84 kJ. Choice A drops the mass and C inflates the temperature change. Core: heat = mass × specific heat × temperature change.A wooden block of density 600 kg/m3 floats in water (density 1000 kg/m3). What percentage of its volume is submerged?
Correct answer: A
Floating requires the buoyant force to equal the weight, so the submerged fraction equals the density ratio: 600/1000 = 60%. Choice B is the emerged fraction and E inverts the ratio. Core: submerged fraction = object density divided by fluid density.A sound wave in air has a frequency of 340 Hz and travels at 340 m/s. What is its wavelength?
Correct answer: D
From v = fλ, λ = v/f = 340/340 = 1 m. Choice B confuses speed with wavelength and E multiplies speed by frequency. Core: wavelength = speed divided by frequency.In a double-slit experiment, laser light of wavelength 600 nm shines on slits separated by 0.1 mm, with a screen 2 m away. What is the spacing between adjacent bright fringes, in millimeters?
Correct answer: B
Fringe spacing Δy = λL/d = (6×10-7 × 2)/(1×10-4) = 1.2×10-2 m = 12 mm. Choices A and D are power-of-ten slips. Core: fringe spacing = λL/d.A photon has a frequency of 5×1014 Hz (visible range). What is its energy? (h = 6.6×10-34 J·s)
Correct answer: C
E = hf = 6.6×10-34 × 5×1014 = 3.3×10-19 J. Choice B mishandles the exponents and A divides frequency by h. Core: photon energy = h times frequency.A soccer ball is kicked at 20 m/s at an angle of 30° above the horizontal (g = 10 m/s2). What maximum height does it reach?
Correct answer: E
The vertical component is vy = 20 sin30° = 10 m/s, so h = vy2/(2g) = 100/20 = 5 m. Choice C uses the cosine and D forgets the factor of 2. Core: maximum height = (v sinθ)2/(2g).A satellite orbits Earth in a circular orbit at an altitude equal to the Earth radius R above the surface, and the surface gravitational acceleration is 10 m/s2. By the law of universal gravitation, what is the gravitational acceleration at that orbit in m/s2?
Correct answer: A
By the law of universal gravitation, g falls off as the inverse square of the distance from the center of Earth: the orbit radius is r = R + R = 2R, so g′ = 10 × (1/2)2 = 2.5 m/s2. Choice B halves it linearly and C assumes no change with altitude. Core: universal gravitation decays with the inverse square of distance.A 0.5 kg mass hangs from a light spring of stiffness 50 N/m and oscillates in simple harmonic motion. What is its period?
Correct answer: D
T = 2π√(m/k) = 2π√(0.5/50) = 2π × 0.1 ≈ 0.63 s. Choice A skips the square root and C quotes the frequency. Core: spring period = 2π√(m/k).On frictionless ice a 2 kg block moving at 6 m/s catches and sticks to a 4 kg block moving the same way at 3 m/s. What is their common speed after the collision?
Correct answer: B
Momentum is conserved: v = (2×6 + 4×3)/(2 + 4) = 24/6 = 4 m/s. Choice A is a simple average and E adds the speeds. Core: for a perfectly inelastic collision, conserve momentum.In a circuit, a 6 Ω resistor is in series with a parallel pair of 3 Ω and 6 Ω, and the whole thing is connected to a 16 V battery. What is the main current?
Correct answer: E
The parallel pair gives R = (3×6)/(3+6) = 2 Ω, the total is 8 Ω, and I = 16/8 = 2 A. Choice B omits the series 6 Ω and C treats the parallel part as 4 Ω. Core: reduce the parallel part first, then add the series resistance.A proton (q = 1.6×10-19 C) moves at 2×106 m/s perpendicular to a uniform 0.5 T magnetic field. What magnetic force acts on it?
Correct answer: C
F = qvB = 1.6×10-19 × 2×106 × 0.5 = 1.6×10-13 N. Choice A is off by one power of ten and D uses the charge as the force. Core: magnetic force = qvB when v is perpendicular to B.A 5 μF capacitor is charged to 12 V. How much charge does it store?
Correct answer: A
Q = CU = 5 μF × 12 V = 60 μC. Choice B inverts the formula and D confuses microcoulombs with millicoulombs. Core: capacitance is defined by Q = CU.A light ray in air strikes a glass block (n = 1.5) at an incidence angle of 45°. What is the refraction angle, to the nearest degree?
Correct answer: D
Snell law: sinθ2 = sin45°/1.5 ≈ 0.47, so θ2 ≈ 28°. Choice A simply divides the angle by n (45°/1.5 = 30°). Core: n1sinθ1 = n2sinθ2.A fixed amount of ideal gas is sealed in a rigid container at 100 kPa and 300 K. If it is heated to 600 K, what is the new pressure?
Correct answer: B
At constant volume, pressure is proportional to absolute temperature: P2 = 100 × (600/300) = 200 kPa. Choice A inverts the ratio and D confuses the temperature value with the pressure. Core: at fixed volume, P ∝ T.Light of wavelength 500 nm shines on a metal with work function 2.0 eV (hc ≈ 1240 eV·nm). What is the maximum kinetic energy of the emitted electrons?
Correct answer: E
The photon energy is 1240/500 = 2.48 eV, so KEmax = 2.48 − 2.0 = 0.48 eV. Choice C forgets the work function and D adds instead of subtracting. Core: KEmax = photon energy − work function.A 100-turn coil of area 0.01 m2 sits in a magnetic field that rises uniformly from 0.2 T to 1.2 T in 0.4 s. What EMF is induced in the coil?
Correct answer: C
Each turn sees ΔΦ = A·ΔB = 0.01 × 1.0 = 0.01 Wb, so EMF = NΔΦ/Δt = 100 × 0.01/0.4 = 2.5 V. Choice B drops the turn count and D drops the time. Core: Faraday law of induction, EMF = N·ΔΦ/Δt.A uniform disk (moment of inertia I = ½MR2) of mass 4 kg and radius 0.5 m starts at rest on frictionless bearings. A constant torque of 2 N·m acts for 5 s. What is the final angular speed?
Correct answer: A
I = ½ × 4 × 0.52 = 0.5 kg·m2, so α = τ/I = 2/0.5 = 4 rad/s2 and ω = αt = 4 × 5 = 20 rad/s. Choice C uses I = MR2 instead and B quotes the angular acceleration. Core: the rotational form of Newton second law is τ = Iα.A 0.1 kg bullet moving at 400 m/s horizontally embeds itself in a 3.9 kg block at rest on a frictionless table. How much mechanical energy is converted to internal energy?
Correct answer: D
The common speed after impact is v = 0.1×400/(0.1 + 3.9) = 10 m/s. The initial kinetic energy of 8000 J drops to ½ × 4 × 102 = 200 J, so 7800 J is lost. Choice B stops at the initial energy and A at the final energy. Core: momentum is conserved but kinetic energy is not in a perfectly inelastic collision.A string of length 2 m is fixed at both ends, and transverse waves on it travel at 8 m/s. What is the frequency of its third harmonic (third normal mode)?
Correct answer: B
The fundamental is f1 = v/(2L) = 8/4 = 2 Hz, so f3 = 3f1 = 6 Hz. Choice D comes from using v/L for the fundamental, and A is the fundamental itself. Core: fn = nv/(2L) for a string fixed at both ends.A spaceship travels at a constant 0.6c. The ship clock records 10 years for the trip. How long does the trip last in the Earth frame?
Correct answer: C
γ = 1/√(1 − 0.62) = 1/0.8 = 1.25, so Δt = γΔt0 = 1.25 × 10 = 12.5 years. Choice A inverts γ (10 × 0.8) and B ignores time dilation. Core: moving clocks run slow; Δt = γΔt0.Unified Physics Bowl specs, consistent across years.
Division 1 is for first-year physics students (no calculus); Division 2 is for second-year and AP Physics C students. The two divisions are ranked and awarded separately — students must choose one and cannot take both. Pick based on your level; our advisor can help.
Four steps · Overview / Topics / Practice / Prep
Read the 2025 Physics Bowl overview and format specs to grasp the year’s style.
Review the key topics and weights, and locate your weak areas.
Complete the 25 mock questions; submit for auto-grading and right/wrong marks.
Open the step-by-step solutions, learn from mistakes, and scan for full papers to push for national and global rankings.
Prep tips and score-boosting advice for the 2025 Physics Bowl.
That is a little over one minute per question on average. Keep the first 30 under a minute each to bank time for the tougher final problems; mark and skip anything that stalls you, then sweep back at the end.
Division 1 avoids calculus and suits first-year and beginning students; Division 2 targets second-year and AP Physics C students. Rankings and awards are separate, and you may enter only one division.
Correct answers score and wrong answers cost nothing, so never leave a blank. Eliminate clearly wrong options first, then commit to a guess: the expected value is always positive.
Kinematics, Newton laws and energy-momentum anchor mechanics every year; focus on circuit analysis and magnetic forces in electromagnetism; treat specific heat and the ideal gas law as must-win points.
Use the 2025 paper to feel the style and the clock, then the 25 original drills on this page for topic-by-topic repair. Scan the QR code for the paper and answers, and keep an error log for review.
Frequent questions about the 2025 Physics Bowl papers and answers.
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