A container and its contents weigh 80 N where g=10 N kg−1g=10\ \mathrm{N\,kg^{-1}}g=10 Nkg−1. A mass of 2.0 kg is removed from the contents. The container is moved to a place where g=5.0 N kg−1g=5.0\ \mathrm{N\,kg^{-1}}g=5.0 Nkg−1. What is its new weight?
30 N30\ \mathrm{N}30 N
20 N20\ \mathrm{N}20 N
39 N39\ \mathrm{N}39 N
40 N40\ \mathrm{N}40 N
103 exam-style questions on Edexcel GCSE Physics 2.3 Forces and Newton's laws, covering 2.3.1 Newton's first law, 2.3.2 Newton's second law, and 2.3.3 Weight and gravitational field strength. Each one has a worked solution and a mark scheme showing where the marks go.