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Twelfth Grade (Grade 12) Mechanics Questions

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Grade 12 Forces and Motion

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Weight is a measure of                                                   .
  1. your mass
  2. the gravitational attraction between you and Earth
  3. mechanical equilibrium
  4. all of these
  5. none of these
Grade 12 Energy and Momentum
A force applied to a body is said to do "work"                                                                        .
  1. if the body is displaced in the direction of the applied force
  2. if the body is displaced in the direction opposite to the applied force
  3. even if the body does not move
  4. only when the body is moving
Grade 12 Forces and Motion

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You have two objects. One object weighs 50 N on the Moon. One object weighs 50 N on Earth. Which object would have the greatest mass?
  1. They have the same mass.
  2. The one on Earth.
  3. The one on the Moon.
Grade 12 Forces and Motion
What is the definition for the term "vector"?
  1. a quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another
  2. the total displacement (Δd), change in position , divided by the total time for that displacement.
  3. they can provide tons of information of an objects motion in graph
  4. A and C
Grade 12 Forces and Motion
According to Newton’s laws of motion, an object set in motion remains in motion unless a force acts on it. If you suspend an object from a string and make it swing, the object will swing for a while, then slow down and stop. Why does the suspended object stop swinging?
  1. It is because an object at rest remains at rest unless a force acts upon it.
  2. It is because the mass of the object is too small to maintain the motion.
  3. It is because energy is the ability to do work.
  4. It is because gravity is pulling it toward the Earth.
  5. It is because energy of motion is converted to heat through friction with air.
Grade 12 Fluid Mechanics
In the equation for the ideal gas law, PV=nRT, what does n represent?
  1. Newton
  2. number of molecules
  3. number of moles
  4. gas constant
Grade 12 Forces and Motion
Which of the following is an example of scalar quantity?
  1. Has direction and magnitude
  2. Displacement
  3. Position
  4. Distance
Grade 12 Fluid Mechanics
Wind speed will increase considerably in a mountain pass due to the inverse relationship between speed and pressure. What explains this effect?
  1. Pascal's principle
  2. Archimedes' principle
  3. Bernoulli's principle
  4. Newton's principle
Grade 12 Energy and Momentum
Which statement about energy and/or matter is incorrect?
  1. Matter and energy can’t be destroyed.
  2. Matter and energy can’t be created.
  3. All matter tends toward more disordered states.
  4. Energy can be stored and transferred.
  5. Heat energy is composed of heat atoms.
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