Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics > Motion > Flashcards

Motion Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

Scalar quantity

A

A quantity that only a magnitude

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Vector quantity

A

A quantity with both a magnitude and direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

List scalar quantities

A

Speed, mass, distance, time, energy, temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

List vector quantities

A

Velocity, force, displacement, acceleration, momentum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is distance, its symbol and units?

A
  • distance = how far an object has traveled with no regard to direction
  • symbol = d
  • units = meters (m)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is displacement, its symbol and units?

A
  • displacement = the distance an object has traveled in a certain direction
  • symbol = s
  • units = meters (m)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is speed, its symbol and units?

A
  • speed = a measure of how fast an object is travelling
  • symbol = s
  • units = meters per second (m/s)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Formula for average speed

A

Average speed = total distance/ total time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is stopping distance?

A

Total distance travelled during the time it takes for the vehicle to come to a stop

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is stopping distance consisted of?

A

Thinking distance and braking distance (in that order!)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is thinking distance?

A

Distance travelled during the time it takes for the driver to react

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is braking distance?

A

Distance travelled whilst the brakes are being applied

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Stopping distance formula

A

Stopping distance = thinking distance + braking distance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Do factors affecting TD affect the driver or the vehicle?

A

Driver

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Do factors affecting BD affect the vehicle or the driver?

A

Vehicle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Factors affecting thinking distance

A
  • Speed of the car
  • drugs + alcohol
  • tiredness
  • some medications
  • caffeine
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Factors affecting braking distance

A
  • speed of the car
  • icy/wet roads (reduce traction)
  • old worn tires (reduce traction)
  • overloaded cars (stopping power has to increase so it will take longer to stop)
18
Q

What does stationary look like on D-T graphs?

A

Gradient = 0 , horizontal line

19
Q

What does moving forward look like on D-T graphs?

A

Positive gradient, upwards slope

20
Q

What does moving backwards look like on Đ-T graphs?

A

Neagtive gradient, downwards slope

21
Q

What does in front/ behind the starting point look like on D-T graphs?

A
  • in front = above x-axis
  • behind = below x-axis
22
Q

What does moving fast look like on D-T graphs?

A

Steep gradient

23
Q

What does moving slow look like on D-T graphs?

A

Shallow gradient

24
Q

What does constant speed look like on a D-T graph?

A

Straight line

25
Q

What does acceleration/deceleration look like on D-T graphs?

A

Curved line

26
Q

What is gradient equivalent to on D-T graphs?

A

Speed

27
Q

Gradient formula

A

Change in Y / change in X

28
Q

Describe the investigating speed experiment

A
  • roll a marble down a ramp with a clamp and stand attached to it
  • record time taken for marble to roll down the ramp
  • measure the length of the ramp
  • divide total distance of ramp by total time taken to obtain average speed of marble
  • repeat again with altered height in even increments
29
Q

Constant velocity on V-T graph

A

Horizontal line

30
Q

Acceleration on V-T graph

A

equivalent to the gradient

31
Q

Deceleration on V-T graph

A

Negative gradient

32
Q

Positive velocity V-T graph

A

Above x-axis

33
Q

Negative velocity on V-T graph

A

Below x-axis

34
Q

What is gradient equivalent to on a V-T graph?

A

Acceleration

35
Q

How do you find distance travelled on a V-T graph?

A

Use the ‘counting squares method’ and find the area under the graph
- find the area of one square
- count the number of squares
- multiply the values together
OR use the formula s = 1/2(v+u)t

36
Q

Average velocity formula

A

Displacement/ time OR v + u / 2

37
Q

Define acceleration

A

The rate of change in velocity, meaning that an object’s velocity will increase by x meters per second, every second

38
Q

Acceleration units

A

Meters per second squared (m/s2)

39
Q

Deceleration

A

Deceleration is slowing down, basically negative acceleration. So if an object is decelerating, its acceleration is always negative as the final velocity will always be smaller than its initial one

40
Q

Acceleration formula

A

a = v - u / t

Physics (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions