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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 3 of 5

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

1Motion & graphsTwo carts approach each other on a straight track at 23 m/s and 9 m/s. How fast is their separation decreasing? Round to 3 decimal places if needed. Answer in m/s.
m/s
2Motion & graphsA cart moves along a straight track. Its position is recorded every second: t = 0 s: 5 m; t = 1 s: 12 m; t = 2 s: 18 m; t = 3 s: 23 m; t = 4 s: 27 m. What is its average speed over the 4 seconds?
m/s
3Forces & equilibriumAn ideal spring obeys F = kx with k = 750 N/m. A force of 32 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 64 N and 120 N act on a point. Find the magnitude of their resultant. Round to 3 decimal places if needed. Answer in N.
N
5Energy, work & powerA device receives 1210 J and has useful-energy efficiency 65%. Find the useful output energy. Round to 3 decimal places if needed. Answer in J.
J
6Energy, work & powerA constant 92 N force acts through a 29 m displacement. The cosine of the angle between them is -1. Find the work by this force. Round to 3 decimal places if needed. Answer in J.
J
7Momentum & collisionsCarts 9 kg at 15 m/s and 1 kg at -2 m/s collide and stick. Velocities share one signed axis; external impulse is zero. Find their final velocity. Round to 3 decimal places if needed. Answer in m/s.
m/s
8Momentum & collisionsA 15 kg object changes signed velocity from 0 m/s to 4 m/s. Find the net impulse on it. Round to 3 decimal places if needed. Answer in N·s.
N·s
9Thermal physicsFor a uniform slab, k = 0.5 W/(m·K), area = 20 m², thickness = 9 cm and temperature difference = 17 K. Assuming steady one-dimensional conduction, find thermal power. Round to 3 decimal places if needed. Answer in W.
W
10Thermal physicsA 540 g sample completely melts at its melting temperature. Its latent heat is 150000 J/kg. Ignore losses. Find energy required. Round to 3 decimal places if needed. Answer in J.
J
11Electricity & circuitsA model device uses constant power 1075 W for 17 h. Find the energy in kilowatt-hours. Round to 3 decimal places if needed. Answer in kWh.
kWh
12Electricity & circuitsIn a theoretical circuit, 22 Ω and 28 Ω are in series across an ideal 5 V source. Find their total electrical power. Round to 3 decimal places if needed. Answer in W.
W
13Magnetism & inductionA 470-turn coil has flux change 21 mWb per turn over 80 ms. Find average induced emf magnitude. Round to 3 decimal places if needed. Answer in V.
V
14Magnetism & inductionA 53 cm straight wire carries 16 A perpendicular to a uniform field of 1.2 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.

15Energy, work & power (Grade 10)A model device transfers energy at constant power 25 W for 63 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.
J
16Electricity & circuits (Grade 10)What is the unit of charge?