A student wrote these statements in a piece of homework.
Statement 1: The weight of the apple is 1.0 kg.
Statement 2: The lamp has a power of 60 J.
Statement 3: The car accelerates at 3 m/s.
Statement 4: The wave has a frequency of 50 s.
Each statement uses the wrong unit.
Give the correct unit for each statement.
Explain the difference between a quantity measured in joules and a quantity measured in watts.
The student writes:
'The run took 2 minutes 30 seconds, which is 2.30 s.'
Explain why the student is wrong and give the correct time in seconds.
39 exam-style questions on Edexcel GCSE Physics 1.1 Units and quantities, covering 1.1.1 SI units for physical quantities and 1.1.2 Unit prefixes, conversions, significant figures and standard form. Each one has a worked solution and a mark scheme showing where the marks go.