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Grade 7 · Physics

Grade 7 Physics diagnostic

12 questions on motion & graphs, forces & equilibrium, energy, work & power, pressure & fluids and waves & sound. Answer what you can, then check your answers to see which topics are secure and what to practise next.

12 questions5 topicsAbout 15 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 & graphsOn an east-positive axis, position changes from -3 m to 64 m in 4 s. Find the signed average velocity. Round to 3 decimal places if needed. Answer in m/s.
m/s
2Motion & graphsA robot moves 118 m east and then 72 m west along a straight line. Find the total distance travelled. Round to 3 decimal places if needed. Answer in m.
m
3Motion & graphsA rover travels 200 m in 21 s, then 309 m in 58 s. Find its average speed for both stages. Round to 3 decimal places if needed. Answer in m/s.
m/s
4Forces & equilibriumA mass of 73 kg is in a model gravitational field of 10 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.
N
5Forces & equilibriumA 10 kg cart has horizontal forces 37 N right and 29 N left. No other horizontal forces act. Taking right as positive, find its acceleration. Round to 3 decimal places if needed. Answer in m/s².
m/s²
6Energy, work & powerA model device transfers energy at constant power 675 W for 33 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.
J
7Energy, work & powerA 24 kg load is raised vertically by 3 m in a field g = 10 N/kg. Find its gravitational potential-energy gain. Round to 3 decimal places if needed. Answer in J.
J
8Energy, work & powerA model device transfers energy at constant power 880 W for 8 s. Find the transferred energy. Round to 3 decimal places if needed. Answer in J.
J
9Pressure & fluidsA normal force of 530 N acts uniformly over 0.06 m². Find the pressure. Round to 3 decimal places if needed. Answer in Pa.
Pa
10Pressure & fluidsSurface pressure is 100000 Pa and the liquid adds 15000 Pa. Find absolute pressure.
Pa
11Waves & soundA wave has frequency 15 Hz and wavelength 3.5 m. Find its speed. Round to 3 decimal places if needed. Answer in m/s.
m/s
12Waves & soundA wave has frequency 4 Hz and wavelength 3 m. Find speed.
m/s