A car requires of work to accelerate from rest to

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

Problem

A car requires

50\,\text{kJ}

of work to accelerate from rest to

20\,\text{m/s}

. Ignoring friction, how much additional work is needed to raise its speed from

20\,\text{m/s}

40\,\text{m/s}

? (a)

50\,\text{kJ}

(b)

100\,\text{kJ}

(c)

150\,\text{kJ}

(d)

200\,\text{kJ}