Statics
Physics ⇒ Mechanics
Statics starts at 9 and continues till grade 12.
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See sample questions for grade 10
Define the term 'couple' in the context of statics.
Describe the difference between stable, unstable, and neutral equilibrium.
Describe what happens to the stability of an object if its center of gravity is raised.
Explain why a tightrope walker carries a long pole.
A 10 N force is applied perpendicular to a door at a distance of 0.8 m from the hinge. What is the moment about the hinge?
A 2 m long uniform plank weighing 100 N is supported at one end. Where should a 200 N load be placed so that the plank remains horizontal?
A 50 N force acts at a distance of 0.4 m from a pivot. Calculate the moment produced by the force.
A ladder of length 5 m rests against a smooth wall, making an angle of 60° with the ground. If the weight of the ladder is 250 N, acting at its center, calculate the horizontal force exerted by the wall on the ladder.
Which of the following best describes a couple?
(1) Two forces acting in the same direction
(2) Two equal and opposite forces whose lines of action are parallel but not collinear
(3) Two forces acting at the same point
(4) Two unequal forces acting in opposite directions
Which of the following is a condition for an object to be in static equilibrium?
(1) The net force acting on the object is zero.
(2) The net torque acting on the object is zero.
(3) Both net force and net torque are zero.
(4) The object is moving at constant velocity.
Which of the following is NOT a condition for equilibrium?
(1) Net force is zero
(2) Net torque is zero
(3) Center of gravity is at the base
(4) All forces are balanced
Which of the following is NOT a type of force commonly considered in statics?
(1) Gravitational force
(2) Frictional force
(3) Magnetic force
(4) Tension force
Fill in the blank: The moment of a couple is equal to one of the forces multiplied by the __________ between them.
Fill in the blank: The point at which the entire weight of a body appears to act is called the __________.
Fill in the blank: The resultant of two equal and opposite forces acting along the same line is __________.
Fill in the blank: The SI unit of moment of force is __________.
True or False: The center of gravity of a triangle is at the intersection of its medians.
True or False: The center of gravity of a uniform rectangular plate lies at its geometric center.
True or False: The moment of a force depends on both the magnitude of the force and the perpendicular distance from the pivot.
Yes or No: Can a body be in equilibrium if only one force acts on it?
