Question

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

Answer 1

Explanation:

1. For an object moving with constant speed, the value of acceleration will be zero.
2. The slope of this line will be zero as the particle is moving at a constant speed.
3. For example: If a particle has zero acceleration and travels at a constant speed of $10\mathrm{m}/\mathrm{s}$ then it will continue to 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.