2. KINEMATICS Flashcards
1
Q
- Is anything in this world truly and utterly stationary?
A
- no
- everything, even seemingly stationary things, all move with the Earth’s rotation
2
Q
- What is the definition of kinematics?
A
- the classification and comparison of motions
3
Q
- What is the position of an object?
A
- it is where the object is situated in relation to some reference point (often the origin)
- this helps to find the location of an object
4
Q
- What is the origin?
A
- it is the zero point of an axis
- this is where x=0 and y=0
5
Q
- What is the relation of the x and y axises to each other?
A
- they are always perpendicular to each other
6
Q
- What kind of co-ordinate do objects positioned to the right of the origin (0;0) have?
A
- they have a positive x co-ordinate
7
Q
- What kind of co-ordinate do objects positioned to the left of the origin (0;0) have?
A
- they have a negative x co-ordinate
8
Q
- What kind of co-ordinate do objects above the origin (0;0) have?
A
- they have a positive y co-ordinate
9
Q
- What kind of co-ordinate do objects below the origin (0;0) have?
A
- they have a negative y co-ordinate
10
Q
- What is the definition of distance?
A
- it is the length of the path travelled by the object from one place to another
11
Q
- Is distance a vector or a scalar quantity?
A
- it is a scalar quantity
12
Q
- What does scalar quantity mean?
A
- it only has a magnitude (value)
- there is no direction
13
Q
- Provide a definition for displacement?
A
- it is the distance travelled, with an associated direction
- it is the change in the object’s position
14
Q
- What is the equation of displacement?
A
- Displacement= change in position
- Change in position= Final Position- Initial position
15
Q
- Is displacement a vector or a scalar quantity?
A
- it is a vector quantity
- it has a magnitude and direction
16
Q
- What happens if an object moves from x1=5m to x2=200, and then back to x1=5m?
A
- the displacement from start to finish is zero
17
Q
- What is the definition of velocity?
A
- it is the rate of change of displacement
- it is the speed of an object in a given direction
18
Q
- How is average velocity worked out?
A
- it is the change in displacement divided by the change in time
19
Q
- What is the unit for average velocity?
A
- it is metres per second
- m/s
20
Q
- is velocity a vector or a scalar quantity?
A
- it is a vector quantity
- it signifies both the magnitude of how fast an object is moving and in which direction it is going
21
Q
- What is the definition of average speed?
A
- it is the rate of change of distance
- it is how fast the particles move
- it involves the total distance covered
- average speed is independent of the direction
22
Q
22.Is average speed a vector or a scalar quantity?
A
- it is a scalar quantity
23
Q
- What is the basic definition of acceleration?
A
- an object that has a changing velocity is said to be accelerating
24
Q
- What is a more specific definition of acceleration?
A
- it is the rate of change of velocity
- how rapidly the velocity of an object changes
25
Q
- Is Acceleration a vector or a scalar quantity?
A
- it is a vector quantity
- it has magnitude and direction
26
Q
- What is the definition of Average Acceleration?
A
- it is defined as the change in velocity divided by the change in time
27
Q
- What is the unit of acceleration?
A
- meters per second squared
- m/s2
28
Q
- What do all objects falling freely towards Earth have?
A
- they have the same acceleration
29
Q
- What is the direction and the value of constant gravitational acceleration?
A
- it acts downwards
- g=9.81m/s2
30
Q
- What is the full name of g?
A
- acceleration due to gravity
31
Q
- Why does a feather drop to the ground so much slower than a rock if both have the same gravitational acceleration?
A
- due to the air resistance on the feather
32
Q
A
- A
33
Q
Read through this summary.
Does it make sense?
A
- yes
34
Q
Read through this summary.
Does it make sense?
A
- yes
