A particle has initial velocity

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

Problem

A particle has initial velocity

15\,\text{m}\,\text{s}^{-1}

. It experiences a constant deceleration of

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

for

4\,\text{s}

and then a constant acceleration of

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

for the next

6\,\text{s}

. Its velocity at the end of

10\,\text{s}

from the start is (a)

10\,\text{m}\,\text{s}^{-1}

(b)

15\,\text{m}\,\text{s}^{-1}

(c)

3\,\text{m}\,\text{s}^{-1}

(d)

0\,\text{m}\,\text{s}^{-1}

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