Equilibrium of Forces
Physics ⇒ Mechanics
Equilibrium of Forces starts at 9 and continues till grade 12.
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See sample questions for grade 9
A 10 N force acts to the right and a 10 N force acts to the left on a box. What is the net force on the box?
A 15 N force acts upward and a 10 N force acts downward on a body. What additional force is needed to keep the body in equilibrium?
A 50 N weight is suspended by two ropes making angles of 30° and 60° with the ceiling. Calculate the tension in each rope.
A block is suspended by two ropes making equal angles with the ceiling. If the weight of the block is 100 N, what is the tension in each rope?
A body is in equilibrium under the action of four forces. If three of the forces are known, how can you find the fourth force?
A body is in equilibrium under the action of three forces. If two of the forces are 5 N and 12 N, and act at right angles to each other, what is the magnitude of the third force?
A book rests on a table. The weight of the book acts downward. What force balances this weight?
A ladder rests against a wall. Name the forces acting on the ladder.
A signboard is hanging from two cables at equal angles. If the weight of the signboard is 200 N, what is the tension in each cable if the angles are 60° with the horizontal?
A uniform beam is balanced at its center. What can you say about the forces acting on it?
A uniform rod is balanced horizontally on a fulcrum placed at its center. If a 20 N weight is hung 2 m from the center on one side, how far from the center on the other side should a 10 N weight be hung to balance the rod?
Describe what happens to a body if the forces acting on it are not in equilibrium.
Explain the difference between static and dynamic equilibrium.
Explain why a person standing in a stationary elevator is in equilibrium.
Explain why a tightrope walker carries a long pole.
If three forces act on a body and keep it in equilibrium, what can you say about the vector sum of these forces?
State the conditions for a body to be in complete equilibrium.
State the principle of moments for equilibrium.
State the two types of equilibrium.
What is meant by the equilibrium of forces?
