A car of mass climbs a straight road inclined at to the horizontal

PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

A car of mass

800\,\text{kg}

climbs a straight road inclined at

10^{\circ}

to the horizontal. At an instant when its speed is

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

, the engine is delivering a constant power of

50\,\text{kW}

. Neglecting friction, determine the car’s instantaneous acceleration at that instant.

(g=9.8\,\text{m s}^{-2})

(a)

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

(b)

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

(c)

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

(d)

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