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Physics unit 1 > Motion Unit 2 AOS1 > Flashcards

Motion Unit 2 AOS1 Flashcards

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1
Q

What is a scalar?

A

(of a quantity) having only magnitude, not direction. the quantity can be measured independently in the direction.
Mass, Time, Length, Speed, Energy.

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2
Q

what is a vector?

A

a quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another.
- Displacement, Velocity, Force, Acceleration.

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3
Q

What do the Arrows show?

A

Represents the direction and magnitude

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4
Q

what is magnitude?

A

The great size or extent of something.

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5
Q

what is the distance? (Scalar)

A

Is how far a body moves/travels during motion

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6
Q

What is the displacement? (Vector)

A

Change in position of a body in a given direction

How far is the final position away from the initial position of change?

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7
Q

What is speed?

A

Speed is the measure of how fast an object is traveling at a given moment. 2 readings - average speed

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8
Q

what is velocity?

A

Velocity is the measure of speed and direction

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9
Q

Velocity =

A

Displacement/Time

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10
Q

Time =

A

Distance/ Velocity

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11
Q

Speed =

A

Distance/ Time

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12
Q

What is Acceleration?

A

is the rate of change of velocity. change of direction at a constant speed is the acceleration.

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13
Q

Acceleration =

A

Delta Velocity/ Time

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14
Q

Delta Velocity =

A

Final ‘v’ - initual ‘U’

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15
Q

Total distance =

A

Speed x Time convert to m/s/s

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16
Q

Average velocity =

A

changed in displacement (Final ‘v’ - initual ‘U’) / Time

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17
Q

Constant acceleration

A

When the acceleration of an object is constant, the following formulae can be used to describe its motion.

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18
Q

A = Acceleration and you don’t need to find the displacement

A

s = 1/2 x (u+v) x t

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19
Q

V = Final velocity and you don’t need to find the displacement

A

S = ut + 1/2 at^2

20
Q

U = Initial Velocity and you don’t need to find the displacement

A

S = ut - 1/2 at^2

21
Q

T = Time and you don’t need to find the displacement

A

V^s - U^2 = 2as

22
Q

Steps to calculate constant Acceleration in a straight line

A
  1. Treat each object as a point mass
  2. Identify the 3 quantities that we are given and the one you need to find out.
  3. Use the equation that doesn’t have quantity in it and is irrelevant
  4. Take care with directions and signs
  5. Rearrange the formula to Solve for unknown
23
Q

Characteristics of a distance-time graph

A
  • Gradient represents the speed

- Negative represents returning back to the origin

24
Q

Characteristics of displacement- time graph

A
  • Graphical representation of a journey involving direction

- The negative region represents displacement in a reverse direction

25
Q

Characteristics of a speed/velocity-time graph

A
  • Graphical representation of a journey
  • Gradient represents direction
  • The area represents distance traveled
26
Q

North is…

A

Positive

27
Q

South is…

A

Negative

28
Q

West is…

A

Negative

29
Q

East is…

A

Positive

30
Q

N*E true bearing…

A

is Exact

31
Q

N*W True bearing is

A

360 -?

32
Q

S*E True bearing is

A

180-?

33
Q

S*W True bearing is

A

180 +?

34
Q

Instantanious speed =

A

Measures how fast an object i traveling at a specific moment in time.
Distance/Time

35
Q

Instantaneous Velocity =

A

Measures of fast and in which direction the object is traveling at a specific moment in time.
V = Displacement/Time

36
Q

Characteristics of a velocity-time graph

A
  • Gradient represents Acceleration

- The area represents displacement traveled

37
Q

Calculate the area of a trapezium

A

A= a+b/2 x h

38
Q

Calculate the area of a rectangle and square

A

= LXW

39
Q

Calculate the area of a triangle

A

A = 1/2 Bxh

40
Q

Calculate the area of a semi-circle and circle

A

semi-circle A = Pi* r^2 Circle A= Pi*r^2/2

41
Q

Calculate the area of a semi-circle and circle

A

semi-circle A = Pi* r^2 Circle A= Pi*r^2/2

42
Q

Calculate the Hypotenuse (Longer side of a triangle)

A

c= a2+b2, Root of the answer

43
Q

Converting units of speed

A

Kmh to ms^-1 = /3.6

ms^-1 to KMH = x3.6

44
Q

Aderage velocity =

A

Displacement/Time s

45
Q

Average velocity =

A

Displacement/Time s

Physics unit 1 (4 decks)

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