JAMB and WAEC Physics questions: Equilibrium of forces

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

All JAMB WAEC

Question 1· Equilibrium of forces· JAMB
The centre of gravity of a uniform rod is at its
Explanation and discussion
Question 2· Equilibrium of forces· WAEC
A body is in stable equilibrium if, when slightly displaced, it
Explanation and discussion
Question 3· Equilibrium of forces· WAEC
A uniform metre rule is balanced at its 50 cm mark. A 2 N weight hangs at the 20 cm mark. Where must a 3 N weight hang to keep it balanced?
Explanation and discussion
Question 4· Equilibrium of forces· JAMB
A uniform beam 6 m long and weighing 200 N rests on supports at its ends A and B. A 400 N load is placed 2 m from A. Find the reaction at A.
Explanation and discussion
Question 5· Equilibrium of forces· JAMB
A uniform metre rule of weight 2 N is pivoted at the 30 cm mark. What weight hung at the 10 cm mark will keep it horizontal?
Explanation and discussion
Question 6· Equilibrium of forces· JAMB
Two equal and opposite parallel forces of 5 N act 0.4 m apart. Find the moment of the couple.
Explanation and discussion
Question 7· Equilibrium of forces· JAMB
A uniform metre rule is balanced at the 40 cm mark when a mass of 20 g is hung at the 10 cm mark. The mass of the rule is:
Explanation and discussion
Question 8· Equilibrium of forces· WAEC
A spanner 0.25 m long needs a turning moment of 20 Nm to loosen a nut. The force needed at its end is
Explanation and discussion
Question 9· Equilibrium of forces· WAEC
The principle of moments states that for a body in equilibrium
Explanation and discussion
Question 10· Equilibrium of forces· WAEC
A cone resting on its flat base is in
Explanation and discussion
Question 11· Equilibrium of forces· WAEC
A uniform plank resting on a support is in equilibrium. Which statement must be true?
Explanation and discussion
Question 12· Equilibrium of forces· WAEC
Find the moment of a 15 N force acting perpendicularly 0.4 m from a pivot.
Explanation and discussion
Question 13· Equilibrium of forces· WAEC
A ball resting on a level table is in
Explanation and discussion
Question 14· Equilibrium of forces· WAEC
A uniform metre rule balances at its 50 cm mark. A 30 g mass hangs at the 20 cm mark. Where must a 20 g mass hang to restore balance?
Explanation and discussion
Question 15· Equilibrium of forces· JAMB
The centre of gravity of a uniform triangular sheet is at the
Explanation and discussion
Question 16· Equilibrium of forces· JAMB
When three coplanar forces keep a body in equilibrium, they can be represented by
Explanation and discussion
Question 17· Equilibrium of forces· WAEC
A see-saw pivoted at its centre has a 400 N child 1.5 m from the pivot. How far on the other side must a 300 N child sit to balance?
Explanation and discussion
Question 18· Equilibrium of forces· JAMB
A uniform metre rule balances at the 50 cm mark. A 30 N weight hangs at the 20 cm mark. What weight at the 70 cm mark keeps the rule balanced?
Explanation and discussion
Question 19· Equilibrium of forces· JAMB
A uniform metre rule is balanced horizontally on a pivot at its 50 cm mark by the two weights shown. Find W.
Explanation and discussion
Question 20· Equilibrium of forces· WAEC
A racing car is made with a low centre of gravity and wide wheel base to
Explanation and discussion

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JAMB and WAEC Physics questions: Equilibrium of forces

The centre of gravity of a uniform rod is at its

A body is in stable equilibrium if, when slightly displaced, it

A uniform metre rule is balanced at its 50 cm mark. A 2 N weight hangs at the 20 cm mark. Where must a 3 N weight hang to keep it balanced?

A uniform beam 6 m long and weighing 200 N rests on supports at its ends A and B. A 400 N load is placed 2 m from A. Find the reaction at A.

A uniform metre rule of weight 2 N is pivoted at the 30 cm mark. What weight hung at the 10 cm mark will keep it horizontal?

Two equal and opposite parallel forces of 5 N act 0.4 m apart. Find the moment of the couple.

A uniform metre rule is balanced at the 40 cm mark when a mass of 20 g is hung at the 10 cm mark. The mass of the rule is:

A spanner 0.25 m long needs a turning moment of 20 Nm to loosen a nut. The force needed at its end is

The principle of moments states that for a body in equilibrium

A cone resting on its flat base is in

A uniform plank resting on a support is in equilibrium. Which statement must be true?

Find the moment of a 15 N force acting perpendicularly 0.4 m from a pivot.

A ball resting on a level table is in

A uniform metre rule balances at its 50 cm mark. A 30 g mass hangs at the 20 cm mark. Where must a 20 g mass hang to restore balance?

The centre of gravity of a uniform triangular sheet is at the

When three coplanar forces keep a body in equilibrium, they can be represented by

A see-saw pivoted at its centre has a 400 N child 1.5 m from the pivot. How far on the other side must a 300 N child sit to balance?

A uniform metre rule balances at the 50 cm mark. A 30 N weight hangs at the 20 cm mark. What weight at the 70 cm mark keeps the rule balanced?

A uniform metre rule is balanced horizontally on a pivot at its 50 cm mark by the two weights shown. Find W.

A racing car is made with a low centre of gravity and wide wheel base to