T S D Flashcards

(16 cards)

1
Q

Hr to min to sec

A

1hr = 60min ; 1min = 60 secs;
1 sec = 1/3600hr;

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2
Q

Km, Meter, Mile, Foot, Inch, Cm

A

1km = 0.621 mi;
1Km = 1000m
1m = 3.28 ft
25m = 82 ft approx
1 foot = 12inch
Singular foot; Plural feet
1m = 1/1000km
1mile = 1.609 kilometres
127cm = 50 in
1inch = 2.54 centimetres

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3
Q

Distance =

A

Speed x Time =

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4
Q

Speed =

A

Distance / Time =

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5
Q

Time =

A

Distance / Speed =

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6
Q

mr/sec =

A

km/hr =

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7
Q

Km/hr to m/sec =

A

x 5/18 for

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8
Q

m/sec to Km/sec =

A

x 18/5 for

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9
Q

When distance is constant

A

Speed 🔀 1/Time
Speed is inversely proportion to Time, when

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10
Q

When time is constant

A

Speed 🔀 Distance
Speed directly proportion to Distance, when

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11
Q

Inverse, Directly proportion concept in Time, Speed, Distance, Explain

A

Speed is inversely proportion to Time, when Distance is constant.

Speed is directly proportion to Distance, when Time is constant.

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12
Q

Average Speed =

A

Total Distance / Total Time =

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13
Q

Formula when Distance is given with two Speeds, (Speed 1, Speed 2), then you need to find?

A

Average Speed = 2 x S1 x S2 / S1 + S2

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14
Q

Formula when n different Speed is given with n different Distance, then you need to find

A

Average Speed = Total Distance ÷ D1÷S1 + D2÷S2 + D3÷S3 …

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15
Q

Total Time =

A

Total Distance / Average Speed =

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16
Q

Difference between directly proportion to inversely proportional?

A
  • When Speed increases, Time decreases and vice versa that is inversely proportion. This inversely proportion is when Distance is constant.
  • When Speed increases, Distance increases and vice versa that is directly proportion. This directly proportion is when Time is constant.