AQA AS Physics Unit 2: Chapter 7

For Chapter 7 in the AQA Physics A, Nelson Thrornes book.

An 'x' on it's own is multiply.

A '/' on it's own is divide.

PLEASE READ THE QUESTIONS CAREFULLY.

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1. Define the term "vector":

  • A physical quantity with both magnitude and direction.
  • A physical quantity with magnitude only.
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2. Give and example of a "scalar":

  • Acceleration.
  • Distance.
  • Force.
  • Velocity.

3. Define the term "equilibrium":

  • When a resultant force acts upon an object.
  • The state of an object when at rest only.
  • The state of an object when at rest or in uniform motion.
  • The state of an object when the object is accelerating or decelerating.
  • The state of an object when in uniform motion only.

4. Define the "moment of a force about a point".

  • force / perpendicular distance from the line of action of the force to the point.
  • force x distance from the point.
  • force x perpendicular distance from the line of action of the force to the point.
  • force / distance from the point.
  • F = m x a

5. "sum of clockwise moments = sum of anticlockwise moments" is known as what?

  • The equality theory.
  • Wrong.
  • The principle of moments.
  • The principle of momentum.
  • The principle of circles.
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