Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first.
Slide 32
Vector quantity
has magnitude and direction.
is represented by an arrow.
Example: velocity, force, acceleration
Scalar quantity
has magnitude.
Example: mass, volume, speed
Slide 33
Vectors
Resultant
The sum of two or more vectors
For vectors in the same direction, add arithetically.
For vectors in opposite directions, subtract arithetically.
Two vectors that don’t act in the same or opposite direction:
use parallelogram rule.
Two vectors at right angles to each other
use Pythagorean Theorem: R2 = V2 + H2.
Slide 34
Referring to the figure, which of the following are true statements?
A. 50 N is the resultant of the 30- and 40-N vectors.
The 30-N vector can be considered a component of the 50-N vector.
The 40-N vector can be considered a component of the 50-N vector.
All of the above are correct.
Vectors
CHECK YOUR NEIGHBOR
Slide 35
Referring to the figure, which of the following are true statements?
A. 50 N is the resultant of the 30- and the 40-N vectors.
The 30-N vector can be considered a component of the 50-N vector.
The 40-N vector can be considered a component of the 50-N vector.
All of the above are correct.
Vectors
CHECK YOUR ANSWER
Slide 36
Referring to the figure, which of the following are true statements?
A. 100 km/h is the resultant of the 80- and 60-km/h vectors.
The 80-km/h vector can be considered a component of the 100-km/h vector.
C. The 60-km/h vector can be considered a component of the 100-km/h vector.
All of the above are correct.
Vectors
CHECK YOUR NEIGHBOR
Slide 37
Referring to the figure, which of the following are true statements?
A. 100 km/h is the resultant of the 80- and 60-km/h vectors.
The 80-km/h vector can be considered a component of the 100-km/h vector.
C. The 60-km/h vector can be considered a component of the 100-km/h vector.
All of the above are correct.
Vectors
CHECK YOUR ANSWER
Slide 38
Vectors
Vector components
Vertical and horizontal components of a vector are perpendicular to each othe.r
Determined by resolution.
Slide 39