Physics

Problem

8\,\text{kg}

sled is pulled east on snow (

\mu_k = 0.10

). A boy pulls with a horizontal force of

40\,\text{N}

east, while a steady wind exerts

10\,\text{N}

west. What additional horizontal force must a second person apply so that the sled accelerates eastward at

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

? Take

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

. a)

6\,\text{N}

west b)

1.8\,\text{N}

east c)

18\,\text{N}

east d)

1.8\,\text{N}

west