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Grade 11 · Physics

Grade 11 Physics diagnostic

16 questions on motion & graphs, forces & equilibrium, energy, work & power, momentum & collisions, thermal physics, electricity & circuits and magnetism & induction, plus 2 from Grade 10. Answer what you can, then check your answers to see which topics are secure and what to practise next.

16 questions7 topicsAbout 20 minutesSet 1 of 5

Skip a question if you do not know the answer. It is better than guessing, because it shows what to practise.

1Motion & graphsIn one dimension, u = 18 m/s and constant a = -5 m/s². Find the signed velocity after 10 s. Round to 3 decimal places if needed. Answer in m/s.
m/s
2Motion & graphsA model cart starts at 40 m/s and slows uniformly at 8 m/s² until rest. Ignore reaction time. Find the stopping time. Round to 3 decimal places if needed. Answer in s.
s
3Forces & equilibriumAn ideal spring obeys F = kx with k = 550 N/m. A force of 59 N is applied within its linear range. Find its extension. Round to 3 decimal places if needed. Answer in m.
m
4Forces & equilibriumTwo perpendicular forces of 295 N and 708 N act on a point. Find the magnitude of their resultant. Round to 3 decimal places if needed. Answer in N.
N
5Energy, work & powerAn ideal linear spring has k = 430 N/m and extension 6 cm. Find the stored elastic energy. Round to 3 decimal places if needed. Answer in J.
J
6Energy, work & powerA 20 kg object changes speed from 19 m/s to 29 m/s. Find final minus initial kinetic energy. Round to 3 decimal places if needed. Answer in J.
J
7Momentum & collisionsA 20 kg object changes signed velocity from -6 m/s to 12 m/s. Find the net impulse on it. Round to 3 decimal places if needed. Answer in N·s.
N·s
8Momentum & collisionsA 15 kg object has signed velocity 16 m/s on a chosen axis. Find its signed momentum. Round to 3 decimal places if needed. Answer in kg·m/s.
kg·m/s
9Thermal physicsMix 2 kg at 11 °C with 10 kg at 87 °C of the same liquid. Assume equal constant specific heat, no phase change, negligible container heat capacity and no losses. Find equilibrium temperature. Round to 3 decimal places if needed. Answer in °C.
°C
10Thermal physicsA 2.9 kg sample with specific heat 4200 J/(kg·°C) warms by 29 °C. No phase change or heat loss occurs. Find energy supplied. Round to 3 decimal places if needed. Answer in J.
J
11Electricity & circuitsAn ohmic resistor of 24 Ω has potential difference 31 V. Find current. This is a paper calculation, not a construction instruction. Round to 3 decimal places if needed. Answer in A.
A
12Electricity & circuitsA theoretical 10 V ideal source supplies parallel ohmic resistors 35 Ω and 18 Ω. Find total source current. Round to 3 decimal places if needed. Answer in A.
A
13Magnetism & inductionAn ideal AC transformer has primary 300 turns, secondary 900 turns and primary voltage 21 V. Find secondary voltage. Paper model only. Round to 3 decimal places if needed. Answer in V.
V
14Magnetism & inductionA 12 cm straight wire carries 1 A perpendicular to a uniform field of 1 T. Find magnetic force magnitude. Round to 3 decimal places if needed. Answer in N.
N

From Grade 10

These questions check skills from the grade below, so gaps can be spotted early.

15Electricity & circuits (Grade 10)What does a lamp primarily transfer from the electrical system?
16Energy, work & power (Grade 10)A model device transfers energy at constant power 220 W for 40 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.
J