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Eleventh Grade (Grade 11) Mechanics Questions

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Grade 11 Motion in Two- and Three-Dimensions

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In the diagram shown, what force is required to keep an object of mass m from slipping off the disk?
Circular Motion
  1. mg
  2. mv2r
  3. mv22g
  4. 2πmgv2
Grade 11 Forces and Motion
An area of 1.0 m2 and an area of 1.0 cm2 have the same atmospheric pressure applied to them. Which of the following statements is correct?
  1. The atmospheric force is greater on the 1.0 m2 area.
  2. The atmospheric force is equal for both areas.
  3. The atmospheric force is less on the 1.0 m2 area.
  4. Atmospheric force does not depend on pressure or area.
Grade 11 Forces and Motion
A force of 580 N is applied on a 2.0 m2 piston of a hydraulic lift. If a crate weighing 2900 N is raised, what is the area of the piston beneath the crate?
  1. 1.0×10-2 m2
  2. 0.40 m2
  3. 2.5 m2
  4. 1.0×101 m2
Grade 11 Forces and Motion
Which of the following best explains why it is possible to lay on a bed of nails without getting punctured?
  1. The total force decreases as you lay down.
  2. Your weight is spread out over a larger area.
  3. Your surface area decreases when you lay down.
  4. The nails get softer as you warm them up.
Grade 11 Fluid Mechanics
The height of the liquid column that is raised in a capillary is independent of
  1. contact angle.
  2. density of liquid.
  3. acceleration due to gravity.
  4. liquid-air surface tension.
  5. depth to which the capillary is submerged.
  6. radius of the tube.
Grade 11 Energy and Momentum
Energy once used for work is degraded.
  1. True
  2. False
Grade 11 Forces and Motion
Which of the following statements is correct with respect to G and g?
  1. G is a fundamental constant, whereas g is a physical quantity and subject to change.
  2. G and g are both constant, but g is determined by the mass and radius of the Earth.
  3. Both G and g can change, but g can only change if you go to a different planet.
  4. The strength of G is determined by g.
Grade 11 Motion in Two- and Three-Dimensions
A speed skater wants to reduce drag to improve her 500 m time. Which factor should her coach ensure that she applies when competing?
  1. Low tucked body position
  2. Stay behind other skaters before overtaking.
  3. Tight speed skin suit
  4. All of the above
Grade 11 Fluid Mechanics
What is true for a liquid level in a narrow tube as compared to a wider tube?
  1. The liquid level will be higher in a wider tube.
  2. The liquid level will be higher in a narrow tube.
  3. Level of liquid does not depend on thickness of tube.
Grade 11 Forces and Motion
The four tires on an automobile have a combined area of 0.104 m2 in contact with the ground. The weight of the automobile is 3.5×104 N. What is the pressure on the tires?
  1. 3.4×105 Pa
  2. 1.3×106 Pa
  3. 2.5×105 Pa
  4. 5.4×106 Pa
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