Lesson T2.2.2

T2.2.2 Force arrows and adding forces Quiz: KS3 Physics, Unit 2

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson T2.2.2, Force arrows and adding forces: 20 multiple choice questions for the KS3 Physics (National Curriculum), Unit 2: Motion and forces, written with Revision Ninja.

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The 20 questions

  1. What do the length and direction of a force arrow show?

    • Size and direction
    • Energy and time
    • Weight and volume
    • Speed and mass

  2. Two forces act on a box: 10 N to the right and 4 N to the left. What is the resultant force?

    • 6 N to the left
    • 4 N to the right
    • 14 N to the right
    • 6 N to the right

  3. What happens when equal forces act in opposite directions on an object?

    • Circular motion
    • Rapid acceleration
    • Immediate deceleration
    • Constant motion

  4. What is the resultant force when forces acting on an object are balanced?

    • Zero
    • Maximum
    • Negative
    • Doubled

  5. What effect do unbalanced forces have on an object?

    • Keep speed constant
    • Stop completely
    • Remove gravity
    • Change motion

  6. A 30 N force pulls a trolley to the right and 12 N of friction acts to the left. What is the resultant force?

    • 42 N to the right
    • 18 N to the left
    • 12 N to the right
    • 18 N to the right

  7. Three forces act along a line: 5 N right, 3 N right and 2 N left. What is the resultant?

    • 6 N to the left
    • 6 N to the right
    • 0 N
    • 10 N to the right

  8. In a force diagram, what does an arrow twice as long represent?

    • Half the force
    • Equal force
    • Twice the force
    • Squared force

  9. A book rests with equal upward and downward forces. What is its state?

    • Sinking down
    • Accelerating upwards
    • Moving sideways
    • At rest

  10. On a scale force diagram, 10 N is drawn as an arrow 5 cm long. What length shows 25 N?

    • 2 cm
    • 12.5 cm
    • 5 cm
    • 25 cm

  11. A 15 N force and a 5 N force both push an object in the same direction. What is the resultant?

    • 3 N in that direction
    • 20 N in that direction
    • 10 N in that direction
    • 75 N in that direction

  12. How do you combine forces acting in opposite directions?

    • Multiply them
    • Subtract them
    • Divide them
    • Add them

  13. A car's forward and backward resistive forces are equal. How does it move?

    • Stationary
    • Slowing down
    • Speeding up
    • Constant speed

  14. A rocket's engine pushes gas down and the gas pushes the rocket up with 500 N. Gravity pulls it down with 300 N. What is the resultant?

    • 200 N downwards
    • 800 N upwards
    • 200 N upwards
    • 300 N upwards

  15. What state is an object in if the resultant force acting on it is zero?

    • Equilibrium
    • Free fall
    • Accelerating
    • Decelerating

  16. Forces of 4 N to the right, 9 N to the left and 3 N to the right act on a box. What is the resultant?

    • 2 N to the right
    • 6 N to the left
    • 2 N to the left
    • 16 N to the left

  17. A trolley has a non-zero resultant force in one direction. What happens?

    • Slows down
    • Speeds up
    • Reverses direction
    • Stops moving

  18. What condition applies when a falling parachutist moves at a constant speed?

    • Zero gravity
    • Maximum acceleration
    • Balanced forces
    • Unbalanced forces

  19. A 3 N force is shown by a 6 mm arrow on a scale diagram. What length shows 9 N?

    • 12 mm
    • 9 mm
    • 18 mm
    • 27 mm

  20. A box is pushed to the right with 25 N. Friction of 10 N acts to the left and another 5 N of resistance also acts to the left. What is the resultant?

    • 20 N to the right
    • 10 N to the right
    • 10 N to the left
    • 40 N to the right

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