A-level · Forces & Newton's laws

Force diagrams, resultant force & equilibriumExam-style questions

What each force on a free-body diagram is and which way it points (weight always vertically down, normal reaction perpendicular to the surface, tension pulling along a string), why forces add as vectors so a resultant is found component-by-component, and what "in equilibrium" means — the resultant is zero, so the components balance.

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7 questions · A-level level · mark scheme and worked solution on each · no sign-up to try

DifficultyAllLevel 2Level 3Level 4
  1. 1
    Two forces, 66 N due east and 88 N due north, act on a particle. Find the magnitude of the resultant.
    Level 3 · 2 marksTry it
  2. 2
    A particle of mass 44 kg experiences a resultant force of 1212 N. Find its acceleration.
    Level 3 · 2 marksTry it
  3. 3
    Two perpendicular forces of 55 N and 1212 N act on a particle. Find the magnitude of the resultant.
    Level 3 · 2 marksTry it