Speed Average Speed Velocity And Instantaneous Velocity Flashcards
1
Q
Flashcard 1: Define speed
A
- The rate of change of distance.
2
Q
Flashcard 2: SI unit of speed
A
- Metre per second (m/s)
- Kilometre per hour (km/h)
3
Q
Flashcard 3: Instrument used to measure speed
A
- Speedometer
4
Q
Flashcard 4: Define instantaneous velocity
A
- The rate of change of displacement or speed in a given direction.
5
Q
Flashcard 5: SI unit of velocity
A
- Metre per second (m/s or m/s^1) + direction
- Kilometre per hour (km/h or km/h^-1) + direction
6
Q
Flashcard 6: Define average velocity
A
- The velocity an object would have if it covered a certain displacement in a certain interval and travelled at the same speed the whole time.
7
Q
Flashcard 7: Average velocity formula
A
( \text{Average velocity} = \frac{\text{displacement for the whole motion}}{\text{time taken for the whole motion}} )
8
Q
Flashcard 8: Positive and negative values of velocity
A
- Positive velocity (+20m/s) for east
- Negative velocity (-20m/s) for west
9
Q
Flashcard 9: State the speed formula
A
- ( \text{Speed} = \frac{d}{t} )
- ( v = \frac{d}{t} )
10
Q
Flashcard 10: State the average speed formula
A
- ( \text{Average speed} = \frac{d}{t} )
- ( v = \frac{d}{t} )
11
Q
Flashcard 11: State the average velocity formula
A
- ( \text{Average velocity} = \frac{\Delta x}{\Delta t} )
- ( \Delta v = \frac{\Delta x}{\Delta t} )
12
Q
Flashcard 13: Distance-time graph
A
- Graph shows constant, steady or uniform speed
- Stationary is the same as at rest
- Gradient determines speed
13
Q
Flashcard 14: Speed-time graph
A
- Graph shows constant or uniform acceleration
- Stationary is the same as at rest at 0.0
- Gradient determines acceleration
14
Q
Flashcard 15: Motion description from a graph
A
- Detailed descriptions based on the graph’s sections and values
15
Q
Flashcard 16: Identify rest from distance-time graph
A
- A flat horizontal line on the graph indicates rest
