Connected Bodies - Ropes & Tow Bar (Edexcel A-Level Mathematics): Flashcards

Every force has an equal and opposite reaction force

Multiple objects linked & moving together

Draw separate free body diagrams for each object

Apply $F=ma$ for each body with consistent acceleration

Consider tension acts in opposite directions

Same magnitude but opposite direction

No extra weight added to particles

Both particles accelerate at same rate

Direction of motion (easier calculations)

$30 - T = 5a$

$T - 6 = 3a$

$3 \, \text{ms}^{-2}$

$15 \, \text{N}$