An automobile’s speed increases uniformly from to while experiencing an average…

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

Problem

An automobile’s speed increases uniformly from

54\,\text{km/h}

90\,\text{km/h}

while experiencing an average acceleration of

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

. Approximately how long does this acceleration last? (a)

1.8\,\text{s}

(b)

6.7\,\text{s}

(c)

3.3\,\text{s}

(d)

12\,\text{s}