Kinematics Pt. 1 Flashcards
THE BASICS (17 cards)
1
Q
Scalar Quantities
A
Has magnitude and units
ex. 20 cm. 10J
2
Q
Vector Quantities
A
Has magnitude, units and DIRECTION
ex. 5km [N]
3
Q
Distance
A
Scalar (no direction)
Δd
4
Q
Position
A
Vector
Straight line distance and direction from a reference point
5
Q
Displacement
A
Vector
Change in object’s position
know d1 and d2
6
Q
Average speed
A
Rate of change - distance
scalar
7
Q
Average velocity
A
Rate of change - position
vector
8
Q
Uniform Motion
A
Obj. travels @ Constant speed and constant direction
- Constant velocity
USE v→= Δd / Δt
9
Q
Examples of Uniform Motion
A
- Being @ rest
- toy moves @ constant speed in a straight line
10
Q
Examples of Non-Uniform Motion
A
- An obj. falling
- keys travelling in a circle @ constant speed (not constant direction)
11
Q
Position Time Graph
A
- SLOPE is VELOCITY
- SLOPE of 2 pts. is AVERAGE VELOCITY
- SLOPE of tangent line is INSTANTANEOUS VELOCITY
12
Q
Uniform Motion on d→ t graph
A
- Straight lines
13
Q
-ve Instantaneous velocity
A
Switch the direction
ex -1m[N] = 1m [S]
14
Q
Curved d→ t
A
Object is SPEEDING UP
15
Q
Velocity time graph
A
- SLOPE is ACCELERATION
line of 2 pts. is AVERAGE ACCELERATION - SLOPE of tangent line is INSTANTANEOUS ACCELERATION
- AREA under graph is DISPLACEMENT
16
Q
Acceleration
A
m/s^2
17
Q
A -ve acceleration means
A
- slowing down in the +ve direction
- speeding up while travelling in the -ve direction
- changing direction
