A particle starts from the origin with velocity along a straight line and moves with…

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A particle starts from the origin with velocity

+8\,\text{m/s}

along a straight line and moves with constant acceleration

-2\,\text{m/s}^2

(positive is to the right). After how many seconds will it cross the origin again? (a)

6\,\text{s}

(b)

8\,\text{s}

(c)

4\,\text{s}

(d)

10\,\text{s}