Physics (AS & A Level) · Oct / Nov 2016 · Paper 11 · Question 9

A car is stationary at traffic lights. When the traffic lights change to green, the driver presses down sharply on the accelerator. The resultant horizontal force acting on the car varies with time as shown. Which graph shows the variation with time of the speed of the car?

1. Aspeed-time graph: speed zero until a time, then increases linearly
2. Bspeed-time graph: speed zero until a time, then increases with increasing gradient
3. Cspeed-time graph: speed zero until a time, then rises sharply to a constant value
4. Dspeed-time graph: speed zero until a time, then rises smoothly to a constant value

As printed in the paper