Physics · Oct / Nov 2025 · Paper 12 · Question 9

A resultant force acts on an object and causes it to move in a straight line. The graph shows how the resultant force varies with time. [graph: resultant force vs time, decreasing linearly from a positive value at t=0 to zero at t0] Which graph is the speed–time graph for the object?

1. Aspeed–time graph: curve increasing from origin, becoming horizontal at t0
2. Bspeed–time graph: curve decreasing from a maximum at t=0 to zero at t0
3. Cspeed–time graph: straight line increasing from origin, becoming horizontal at t0
4. Dspeed–time graph: straight line decreasing from a maximum at t=0 to zero at t0

As printed in the paper