Physics

Problem

Three constant forces act simultaneously on a

2\,\text{kg}

particle initially at rest:

\vec F_1=(10\hat i+5\hat j-2\hat k)\,\text{N}

\vec F_2=(-4\hat i+3\hat j+2\hat k)\,\text{N}

\vec F_3=(0\hat i-8\hat j+0\hat k)\,\text{N}

. During the action, the particle undergoes a displacement

\vec s=(2\hat i+0\hat j+3\hat k)\,\text{m}

. What is its speed after the displacement? a)

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

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

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

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