Solution

Question\n\nA force acts on a ball moving with $14\,\mathrm{m\,s^{-1}}$ speed and brings its speed to $6\,\mathrm{m\,s^{-1}}$. Has the force done positive or negative work? Explain your answer.\n\nContent coming soon. Write the full solution here, or use the part files (p-i.mdx, p-ii.mdx, …) for each part.