Physics: Chapter 4
1800 m
A hiker backpacks to a waterfall that is 1000 m east and 1500 m north of his starting position. What is the magnitude of his displacement?
Direction
A vector diagram has three essential parts: the tip, the magnitude, and the _____.
A ball rolling off a table
Give an example of a horizontal projection.
III
If a vector's reference angle is 10 and the vector angle is 190, which quadrant does the vector lie in?
II
If a vector's reference angle is 40 and the vector angle is 140, which quadrant does the vector lie in?
225
If a vector's reference angle is 45 and it lies in the third quadrant, what is the vector angle?
IV
If a vector's reference angle is 50 and the vector angle is 310, which quadrant does the vector lie in?
I
If a vector's reference angle is 50 and the vector angle is 50, which quadrant does the vector lie in?
True north
Map directions are measured from _____.
Velocity and acceleration
Name two 2D vector quantities
False
T/F: Scalar multiplication of a vector has no effect on its orientation.
False
T/F: The congruence of sides of triangles determines similarity.
False
T/F: The sum of the angles in any triangle is equal to 360.
True
T/F: Vectors can be multiplied by scalars.
True
T/F: When adding vectors graphically, it is not necessary to draw them to scale.
True
T/F: the vector résultant of an object's changes in position is the same as its displacement.
The tip of A to the tail of B
The difference of vectors A and B can be constructed by placing _____.
Magnitude
The modulus of a vector is the same quantity as its _____.
Components
The projections of a vector onto its coordinate axes are the _____ of the vector.
projection
This is motion in which an object is initially propelled horizontally and is allowed to fall ballistically.
Acceleration
This quantity is equal to the velocity difference divided by the time interval of the velocity change.
Right
Triangles containing a 90 angle are called _____ triangles.
True
Two vectors that are added together to produce a resultant are called the components of the resultant.
Displacement
What can be determined from the position forms of the equations of motion?
Vectors can be added in any order
What does the commutative property of vectors say?
-9.81 m/s^2
What is the acceleration due to gravity?
0 m/s^2
What is the horizontal acceleration of a projection?
45 degrees
What is the ideal launching angle to achieve the maximum horizontal displacement?
0 m/s
What is the initial vertical velocity of a horizontal projection?
Trajectory
What is the term describing the path of a projectile?
Projectile
What is the term for any flying object that is given an initial velocity and is then influenced only by external forces such as gravity?
Acceleration
What is the term of the change in velocity within a specified time interval?
-9.81 m/s^2
What is the vertical acceleration of a projection?
0 m/s
What is the vertical velocity of a projectile at its peak?
Direction
When multiplying a vector by a positive scalar number, the vector's _____ stays the same.
Their corresponding sides are congruent
Which is not a necessarily true about similar triangles?
Corresponding sides are proportional
Which is true about similar triangles?
3rd
Which of the 3 equations is not useful in horizontal projections?
270T
Which of the following map directions is equivalent to the Cartesian 180?