Dynamics Flashcards

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1
Q

Is acceleration a vector or a scalar?

A

Vector

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2
Q

Is time a vector or a scalar?

A

scalar

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3
Q

Is velocity a vector or a scalar?

A

Vector

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4
Q

Is distance a vector or a scalar?

A

scalar

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5
Q

Is speed a vector or a scalar?

A

scalar

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6
Q

Is energy a vector or a scalar?

A

scalar

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7
Q

Is displacement a vector or a scalar?

A

vector

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8
Q

Is mass a vector or a scalar?

A

scalar

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9
Q

Is force a vector or a scalar?

A

vector

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10
Q

what is the unit for distance

A

m

(metres)

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11
Q

what is the unit for time

A

s

(seconds)

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12
Q

what is the unit for acceleration

A

ms^-2

^ means “to the power of” on this card

(metres per second squared)

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13
Q

what is the unit for speed

A

ms^-1

^ means to the power of on this card

(metres per second )

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14
Q

what is the unit for velocity

A

ms^-1

^ means to the power of on this card

(metres per second )

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15
Q

what is the unit for displacement

A

m

(metres)

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16
Q

What is the symbol on the formula sheet for
1. initial velocity
2. final velocity

A
  1. u
  2. v

remember u comes before v, you start before you finish

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17
Q

What is the unit for force

A

N

(Newtons)

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18
Q

What is the unit for energy

A

J

(Joules)

19
Q

What is the unit for weight

A

N

remember weight is a FORCE

(Newtons)

20
Q

How do you work out the magnitude of a vector

A

Use pythagoras

remember magnitude means size

21
Q

How do you work out the angle to work out direction for a vector

A

Use tan x = opp / adj

22
Q

What does the gradient of a velocity/time graph give you?

A

acceleration

23
Q

What does the area under the curve of a velocity/time graph give you?

A

Distance travelled

24
Q

What is the acceleration on a velocity / time graph if it looks like this?

  1. \
  2. __
  3. /
A
  1. negative
    (decelerating - slowing down)
  2. zero
    (constant speed)
  3. positive
    (accelerating - speeding up)
25
Q

What is the symbol on the formula sheet for distance?

A

d

26
Q

What is the symbol on the formula sheet for instantaneous speed

A

v

27
Q

What is the symbol on the formula sheet for displacement?

A

s

28
Q

What is the symbol on the formula sheet for instantaneous velocity

A

v

29
Q

What is the symbol on the formula sheet for acceleration?

A

a

30
Q

What is the symbol on the formula sheet for force?

A

F

31
Q

What is the symbol on the formula sheet for weight?

A

W

32
Q

How do you work out the distance travelled from a velocity / time graph?

A

calculate the area under the curve

33
Q

How do you work out the acceleration from a velocity / time graph?

A

Find the gradient

34
Q
A
35
Q
A
36
Q
A
37
Q

What does magnitude mean?

A

How big

38
Q

How do you work out displacement?

A

It’s the shortest distance from start to finish

39
Q

How do you work out a bearing?

A

Start from North -
move clockwise
until you’re pointing in the direction you need to head

40
Q

If a force acts on an object and moves it what kind of energy is this?

A

Work done

Ew

41
Q

If something is high above the ground what kind of energy does it have?

A

Potential energy

Ep

42
Q

If something is moving what kind of energy does it have?

A

Kinetic energy

Ek

43
Q

What is the law of conservation of energy

A

Energy cannot be made or destroyed, it is just transformed from one type of energy into another type of energy.