A powered cart moves along a level track. The table shows the constant driving force and distance travelled during each stage. The driving force acts in the direction of motion, and resistive forces oppose the motion.
| Stage | Driving force in N | Distance in m |
|---|---|---|
| 1 | 150 | 8.0 |
| 2 | 200 | 5.0 |
The cart's kinetic energy store increases by 1.4 kJ. Assume all the energy transferred that does not increase the cart's kinetic energy store increases thermal stores.
Calculate the increase in thermal stores.
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.