By Newton's second law

\(\vec{F}=m \vec{a}\)

for \((1)\) Uniform motion means body is moving with constant velocity. By \((i)\) it can be said that only for accelerated motion force is required

\((2)\) is true using \((i)\)

\((3)\) Using \((i)\) \(\vec{a}=\frac{\vec{F}}{m}\) so this is true