Physics (AS & A Level) · Oct / Nov 2016 · Paper 13 · 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 increases linearly from zero after a delay
2. Bspeed-time graph: speed increases with increasing gradient after a delay
3. Cspeed-time graph: speed rises sharply then becomes constant after a delay
4. Dspeed-time graph: speed rises smoothly (S-shape) then becomes constant after a delay

As printed in the paper