A smooth track in the form of a quarter circle of radius 6m lies in the vertical plane. A particle moves from P₁ to P₂ under the action of forces ${\overrightarrow{\mathrm{F}}}_1$, ${\overrightarrow{\mathrm{F}}}_2$ and ${\overrightarrow{\mathrm{F}}}_3$. Force F₁ is always toward P₂ and is always 20 N in magnitude. Force ${\overrightarrow{\mathrm{F}}}_2$ always acts horizontally and is always 30 N in magnitude. Force ${\overrightarrow{\mathrm{F}}}_3$ always acts tangentially to the track and is of magnitude 15 N. Select the correct alternative(s)