Topic 1 Speed & Moments Flashcards
1
Q
How to Calculate the Speed?
A
Speed = Distance/Time
S = D/T
Speed =D/T
S = Distance/Time
Example Speed = D/T Speed = 10km(Distance) / 1h(Time) 10/1 = 10km/h Speed = 10km/h
Speed = D/T Speed = 150m(Distance) / 5s(Time) 150/5 = 30m/s Speed = 30m/s
2
Q
How to calculate Distance?
A
Distance = Speed x Time D = S x T Distance = S x T D = Speed x Time
Example D = S x T D = 8m/s(Speed) x 12s(Time) D = 8 x 12 = 96m D = 96m
D = S x T D = 15m/s(Speed) x 4s(Time) D = 15 x 4 = 60m D = 60m
3
Q
How to calculate Time?
A
Time = Distance/Speed T = D/S Time = D/S T = Distance/Speed
Example T = D/S T = 50m(Distance) / 25m/s(Speed) T = 50/25 = 2s T = 2s
T = D/S T = 150km(Distance) / 30km/h(Speed) T = 150/30 = 50h T = 50h
4
Q
On a travel graph what happens when you move faster?
A
It gets steeper and steeper.
5
Q
What is Moment measured in?
A
Newton meters or centimetres (Nm or Ncm).
6
Q
What is Force measured in?
A
Newtons (N)
7
Q
What is Distance measured in when it comes to the moment?
A
Meters and Centimetres (m and cm).
8
Q
How to calculate the Moment?
A
Moment = Force x Distance from the pivot. M = F x D
Example M = F x D M = 3N(Force) x 1.5m(Distance) M = 3 x 1.5 = 4.5Nm M = 4.5Nm
9
Q
How to Calculate the Length of the lever(Distance).
A
Distance = Moment / Force D = M / F D = Moment / Force Distance = M / F
Example D = M / F D = 8Nm / 2 D = 8/2 = 4m D = 4m
10
Q
What is a Perpendicular line.
A
A strait horizontal line.
