Question

The Speed-Time graph for a particle moving at constant speed is a straight-line ______ to the time axis.

Answer 1

1. The Speed-Time graph for a particle moving at constant speed in a straight line parallel to the time axis.
2. For an object moving with constant speed, it will have zero acceleration.
3. For example: Consider a particle having zero acceleration traveling at a constant speed of $10m/s$ will travel at this constant speed throughout the time interval.

Hence, the Speed-Time graph for a particle moving at constant speed is a straight-line parallel to the time axis.