Straight Line Motion Return Time – Rankers Physics
Topic: Kinematics
Subtopic: Calculus Based Questions

Straight Line Motion Return Time

A particle moves along a straight line with velocity given by v = (6 – 3t) where v is in m/s and t in seconds. Determine when the particle returns to its starting point.
4 s
2 s
3 s
5 s

Solution:

Displacement is \(s = \int v \, dt = 6t - 1.5t^2\). To return to the starting point, \(s = 0 \implies 6t - 1.5t^2 = 0 \implies t = 4\text{ s}\).

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