JAMB and WAEC Physics questions: Equilibrium of forces

26 questions with answers and explanations. Tap an option to check yourself.

1. Question 21· Equilibrium of forces· JAMB

   A body acted on by parallel forces is in equilibrium when

   • Aonly the sum of the moments is zero
   • Bonly the sum of the forces is zero
   • Cthe sum of the forces and the sum of their moments are both zero
   • Dall the forces are equal

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2. Question 22· Equilibrium of forces· JAMB

   A body is in stable equilibrium if, when slightly displaced, its centre of gravity

   • Afalls
   • Brises
   • Cstays at the same level
   • Dmoves outside its base

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3. Question 23· Equilibrium of forces· WAEC

   A cone resting on its tip is in

   • Astable equilibrium
   • Bunstable equilibrium
   • Cneutral equilibrium
   • Dno equilibrium

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4. Question 24· Equilibrium of forces· JAMB

   A body is in unstable equilibrium if, when slightly displaced, its centre of gravity

   • Amoves upward and back
   • Brises
   • Cstays at the same level
   • Dfalls

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5. Question 25· Equilibrium of forces· JAMB

   A couple consists of

   • Atwo equal, opposite, parallel forces not in the same line
   • Btwo forces in the same direction
   • Ca single force
   • Dthree concurrent forces

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6. Question 26· Equilibrium of forces· JAMB

   A uniform beam balances at its centre. A 100 N weight hangs 1 m from the centre. How far from the centre, on the other side, must a 50 N weight hang to keep the beam balanced?

   • A4 m
   • B0.5 m
   • C1 m
   • D2 m

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   Explanation and discussion