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 10
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 5 kg object is suspended by two ropes making equal angles with the ceiling. If the object is at rest, what can you say about the forces in the vertical direction?
A block is at rest on a rough inclined plane. Name the three forces acting on the block.
A ladder leans against a wall without slipping. Name two forces acting on the ladder that are in equilibrium.
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 an object. What additional force is needed to keep the object in equilibrium?
A 20 N weight is suspended by two ropes at angles of 30° and 60° to the horizontal. Calculate the tension in each rope.
A 5 kg object is suspended by two ropes making equal angles with the ceiling. If the object is at rest, what can you say about the forces in the vertical direction?
A book rests on a table. Which pair of forces are in equilibrium? (1) The weight of the book and the normal force from the table (2) The weight of the book and friction (3) The normal force and friction (4) The weight of the book and air resistance
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 conditions must be satisfied for a body to be in static equilibrium? (1) Net force is zero (2) Net torque is zero (3) Both (1) and (2) (4) None of these
Which of the following is an example of dynamic equilibrium? (1) A car parked on a hill (2) A satellite orbiting Earth at constant speed (3) A pendulum at rest (4) A falling apple
Fill in the blank: In equilibrium, the algebraic sum of the moments of all forces about any point is __________.
Fill in the blank: The condition for rotational equilibrium is that the sum of all __________ about any axis must be zero.
Fill in the blank: The point where the total weight of a body acts is called the __________ of gravity.
Fill in the blank: The sum of all forces acting on a body in equilibrium is __________.
State whether the following statement is true or false: An object in equilibrium can be moving with constant velocity.
True or False: An object in dynamic equilibrium is moving with constant velocity.
True or False: For an object to be in equilibrium, both the net force and the net torque acting on it must be zero.
True or False: The center of gravity of a uniform meter rule is at its 50 cm mark.
