A hypersonic research drone is launched along a straight, horizontal electromagnetic rail.
The drone has an initial speed of 12 m/s at the start of the rail, and accelerates to a launch speed of 76 m/s at the end of the rail.
The constant acceleration of the drone during this launch phase is 22 m/s2.
Calculate the length of the rail, sss, required for the drone to reach its launch speed.
Use the equation:
s=v2−u22a s = \frac{v^2 - u^2}{2a} s=2av2−u253 exam-style questions on Edexcel GCSE Physics 2.2 Speed, velocity and acceleration, covering 2.2.1 Speed and distance–time graphs, 2.2.2 Acceleration and the uniform-acceleration equation, 2.2.3 Velocity–time graphs, and 2.2.4 Measuring speed, typical speeds and free-fall acceleration. Each one has a worked solution and a mark scheme showing where the marks go.