Statics
Physics ⇒ Mechanics
Statics starts at 9 and continues till grade 12.
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See sample questions for grade 9
A 10 N weight is suspended from a rope. What is the tension in the rope if the system is in equilibrium?
A 15 N force acts at an angle of 30° to a lever arm 0.5 m long. What is the effective moment produced? (Use sin 30° = 0.5)
A 50 N force acts perpendicular to a door 0.8 m from the hinge. What is the torque produced?
A force of 5 N acts at a distance of 2 m from a pivot. What is the moment produced?
A seesaw is balanced when a 30 kg child sits 2 m from the pivot on one side. How far from the pivot should a 20 kg child sit on the other side to balance the seesaw?
A uniform beam of length 4 m and weight 200 N is supported at its ends. What is the force exerted by each support?
A uniform meter rule is balanced at the 50 cm mark. If a 10 N weight is hung at the 20 cm mark, where should a 20 N weight be hung to balance the rule?
A uniform rod of length 2 m is balanced at its center. If a 20 N weight is hung 0.5 m from the center on one side, where should a 10 N weight be hung on the other side to balance the rod?
Define the principle of moments.
Describe how the position of the center of gravity affects the stability of a vehicle.
Describe what happens to the stability of an object if its center of gravity is raised.
Explain the difference between stable, unstable, and neutral equilibrium.
Explain what is meant by the 'line of action' of a force.
Explain why a tall, narrow object is more likely to topple than a short, wide object.
Explain why a wider base increases the stability of an object.
State the two conditions necessary for an object to be in static equilibrium.
What is the meaning of 'statics' in physics?
