During a displacement along the positive -axis

PHYSICS · Multi-part · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

During a

6\,\text{m}

displacement along the positive

x

-axis, a

2\,\text{kg}

particle is simultaneously acted upon by three constant forces: (a)

30\,\text{N}

making

30^{\circ}

above the

x

-axis, (b)

25\,\text{N}

making

150^{\circ}

with the

x

-axis, and (c) its weight

20\,\text{N}

vertically downward. (i) Compute the net work done on the particle during the displacement. (ii) If the particle’s initial speed was

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

, determine its speed at the end of the displacement.