A box gains 180 J of gravitational potential energy when it is raised through 1.5 m. Use g=10 N/kgg=10\ \mathrm{N/kg}g=10 N/kg. What is the mass of the box?
270 kg270\ \mathrm{kg}270 kg
18 kg18\ \mathrm{kg}18 kg
120 kg120\ \mathrm{kg}120 kg
12 kg12\ \mathrm{kg}12 kg
121 exam-style questions on Edexcel GCSE Physics 3.1 Energy stores and calculations, covering 3.1.1 Gravitational potential energy, 3.1.2 Kinetic energy, and 3.1.3 Energy transfers and conservation of energy. Each one has a worked solution and a mark scheme showing where the marks go.