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Lesson 1

hagar hany Inglés 7 fichas

Fichas del conjunto (7)

17 base units?time,t,(s)
length,l,(m)
mass,m,(Kg)
Temp,T,theta,(K)
Electric current,I(A)
amount of subs,n,(mol)
Luminous intensity(cd)
2Prefixes of the following multipliers: a)10^12 b)10^9 c)10^6 d)10^3 e)10^-1 f)10^-2 g)10^-3 h)10^-6 i)10^-9 j)10^-12 k)10^-15a-tera
b- giga
c-mega
d-kilo
e-deci
f-centi
g-milli
h-micro
i-nano
j-pico
k-femto
3How to add scalar quantities?using simple arithmetic
Add
4How to add vectors along the same straight line?RESULTANT=F1+F2
5vectors in opposite direction?Resultant= F1 - F2
6How to calculate perpendicular forces? (Magnitude+Direction)*the resultant is the diagonal of the rectangle
*MAGNITUDE: using Pythagoras'
*DIRECTION: using tan(theta)=Opp/Adj
7EXAMPLE: If a trampolinist's initial speed at A is 6 m/s(down) & final speed at B is 10 m/s(Up) What is the change in VELOCITY?ANSWER
1) Change in speed:
new speed-old speed
10-6=4 m/s
2) change in velocity(Vector)
=> vector subtraction
=new-old
=10-(-6)
=+16 m/s