A towing carriage pulls a model ship hull along a straight test tank with a constant horizontal force. The hull is towed 4.0 m to a timing gate and then a further 6.0 m, where the towing stops. During the whole tow, the carriage does 1.2 kJ of work on the hull.
What is the force exerted on the hull by the carriage?
200 N200\ \mathrm{N}200 N
300 N300\ \mathrm{N}300 N
120 N120\ \mathrm{N}120 N
0.12 N0.12\ \mathrm{N}0.12 N
115 exam-style questions on Edexcel GCSE Physics 8.1 Energy transfers and work, covering 8.1.1 Energy stores and transfer diagrams, 8.1.2 Ways of changing a system's energy, and 8.1.3 Work done by forces. Each one has a worked solution and a mark scheme showing where the marks go.