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 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 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 uniform beam is balanced at its center. What can you say about the forces acting on it?
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?
Which law states that if a body is in equilibrium under the action of several forces, the vector sum of all these forces is zero? (1) Newton's First Law (2) Newton's Second Law (3) Newton's Third Law (4) Law of Conservation of Energy
Which of the following is a condition for translational equilibrium? (1) Net force is zero (2) Net torque is zero (3) Center of gravity is at the base (4) Body is rotating
Which of the following is an example of dynamic equilibrium? (1) A car at rest (2) A ball rolling at constant speed (3) A falling apple (4) A swinging pendulum
Which of the following is an example of static equilibrium? (1) A car moving at constant speed (2) A book lying on a table (3) A ball falling freely (4) A spinning top
A body is said to be in equilibrium if the net force acting on it is ________.
Fill in the blank: For a body to be in equilibrium, both the net force and net ________ must be zero.
Fill in the blank: In equilibrium, the sum of all the ________ acting on a body is zero.
Fill in the blank: The condition for rotational equilibrium is that the sum of all ________ about any axis must be zero.
A body is acted upon by two forces of equal magnitude but opposite direction. Is the body in equilibrium?
True or False: A body in equilibrium can have forces acting on it.
True or False: A body in equilibrium must always be at rest.
True or False: If the net torque on a body is zero, the body is in rotational equilibrium.
