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Questions and Answers
If two vectors, each with the same magnitude but opposite directions, are added together, what is the result?
If two vectors, each with the same magnitude but opposite directions, are added together, what is the result?
- Lesser magnitude
- Greater magnitude
- Double the magnitude
- Zero magnitude (correct)
Which of the following measures has the greatest value?
Which of the following measures has the greatest value?
- 10 kg (correct)
- 1 000 cg
- 1 000 g
- 0.01 mg
Identify the following quantities as scalar or vector: the mass of an object, the number of leaves on a tree, and wind velocity.
Identify the following quantities as scalar or vector: the mass of an object, the number of leaves on a tree, and wind velocity.
- Scalar, scalar, vector (correct)
- Vector, scalar, vector
- Vector, scalar, scalar
- Scalar, vector, vector
Which of the following situations is impossible?
Which of the following situations is impossible?
When the distance covered by an object is directly proportional to time, what does this indicate?
When the distance covered by an object is directly proportional to time, what does this indicate?
Which statement is true regarding the addition of vectors A and B to form vector C?
Which statement is true regarding the addition of vectors A and B to form vector C?
If a body is in a state of equilibrium, which of the following conditions must be true?
If a body is in a state of equilibrium, which of the following conditions must be true?
Which of the following is true about speed and acceleration?
Which of the following is true about speed and acceleration?
Which statement regarding vectors A and B is true when they are added to form vector C?
Which statement regarding vectors A and B is true when they are added to form vector C?
Is it possible for an object to achieve equilibrium with only one force acting on it?
Is it possible for an object to achieve equilibrium with only one force acting on it?
Which method should NOT be used for finding the resultant vector graphically?
Which method should NOT be used for finding the resultant vector graphically?
What happens to a horizontally launched projectile when gravity is removed?
What happens to a horizontally launched projectile when gravity is removed?
In which instance will an object's velocity be equivalent to its speed?
In which instance will an object's velocity be equivalent to its speed?
Which condition is required for an object to be in static equilibrium?
Which condition is required for an object to be in static equilibrium?
Which of the following best describes vector addition?
Which of the following best describes vector addition?
What is the consequence of two equal forces acting in opposite directions on an object?
What is the consequence of two equal forces acting in opposite directions on an object?
If Earth's mass were halved, how would your weight change?
If Earth's mass were halved, how would your weight change?
What force is counteracting the gravitational force of a pen resting on a desk, pulling it downward with a force of 15 N?
What force is counteracting the gravitational force of a pen resting on a desk, pulling it downward with a force of 15 N?
What phenomenon causes a ball to move in a straight line after its string is broken while being whirled?
What phenomenon causes a ball to move in a straight line after its string is broken while being whirled?
Which set of data indicates a systematic error when the true value is 5 g?
Which set of data indicates a systematic error when the true value is 5 g?
What is a correct representation of scientific notation for the value 720,000?
What is a correct representation of scientific notation for the value 720,000?
Which object would experience a net force of zero when subjected to forces acting on it?
Which object would experience a net force of zero when subjected to forces acting on it?
What is the primary distinction between speed and acceleration?
What is the primary distinction between speed and acceleration?
Which graphical representation effectively displays vector addition?
Which graphical representation effectively displays vector addition?
Study Notes
Unit Conversions
- Comparing various unit conversions, 10 kg has the greatest value
Scalars and Vectors
- Mass, number of leaves on a tree are scalars
- Wind velocity is vector
Vector Addition and Subtraction
- Adding two vectors of equal magnitude but opposite directions results in a zero magnitude
Motion and Acceleration
- An object can have constant non-zero acceleration even with changing velocity
- An object can have constant non-zero velocity with changing acceleration
- An object cannot have constant velocity with changing acceleration
Constant Velocity
- Distance covered directly proportional to time
Vector Sum
- If A+B = C then A and B must point in the same direction
- A, B and C must be displacements
Equilibrium
- A single force cannot achieve equilibrium
Resultant Vectors
- Finding the resultant vectors graphically involves the use of ruler, protractor, head to tail method and scale.
Projectile motion
- Without gravity, a projectile launched horizontally will keep moving horizontally.
Velocity and Speed
- Velocity and speed are equal along a straight line
Gravity and Weight
- Weight on Earth depends on mass, if mass is split in half, weight is halved
Normal Force
- A pen on a desk is prevented from falling by the desk's upward normal force, which has equal magnitude and opposite direction to the gravitational force acting on it.
Inertia
- A ball whirled on a string, when string breaks will move in straight line due to Inertia.
Systematic Error
- Data set with true/theoretical value of 5g shows systematic error if all values are consistently higher or lower than the true value.
Scientific Notation
- Correct scientific notation: 7.2x105.
- 100x106, 12.5x105, 0.5x10-2 are incorrect expansions.
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Description
This quiz covers essential concepts in physics such as unit conversions, scalars vs. vectors, and the principles of motion and acceleration. Test your understanding of vector addition, equilibrium, and projectile motion through a series of questions. Perfect for reinforcing physical science knowledge.
