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Maths Applied > Chapter 8 & 9 > Flashcards

Chapter 8 & 9 Flashcards

1
Q

Vector

A

Has a magnitude and direction

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2
Q

Vector quantities can be…

A

Positive or negative

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3
Q

A scalar quantity…

A

Has only magnitude and is always positive

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4
Q

Acceleration is the rate of change of what?

A

Velocity

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5
Q

Velocity is the rate of change of what?

A

Displacement

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6
Q

Particle

A

Dimensions of the object are negligible, and so air resistance and external rotational forces can be ignored. It’s mass is concentrated at a single point

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7
Q

Light

A

It’s mass is very small (regarded as 0), such as a string or pulley. Tension is constant throughout

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8
Q

Inextensible

A

Does not stretch under a load. Acceleration is constant throughout.

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9
Q

Average velocity

A

Displacement from starting point/ time taken

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10
Q

Average speed

A

Total distance travelled/ Time taken

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11
Q

What the velocity of a particle at its maximum point

A

0 metres per second

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12
Q

Why is acceleration taken to be constant throughout?

A

Because air resistance isn’t taken into account

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13
Q

Population

A

Consists of all the items we are interested in (not always people)

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14
Q

Sample

A

A subset of items check Sen from a population

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15
Q

Sampling unit

A

Each individual item in the population that can be sampled

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16
Q

Often sampling units of a population are individually named or numbered to form a list called….

A

Sampling Frame

17
Q

Advantages of a census

A

Should give completely accurate result.

18
Q

Disadvantages of a census

A

Time consuming and expensive
Large volume of data to process
Can not be used when testing involves destruction

19
Q

Advantages of a sample

A

Less expensive
Less time consuming
Less data to process

20
Q

Disadvantages of a sample

A

Data may not be accurate

Sample may not be large enough to represent small sub-groups of the population

Maths Applied (2 decks)

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