EMCH 211 (Statics) - Week 1

Newton's Law of Mutual Gravitation, Conversions

What are the base units of Length in ENG?

inch (in), foot (ft), yard (yd), mile (mi)

What are the base units of Length in SI?

meter (m)

What are the base units of Mass in ENG?

lbm, slug

What are the base units of Mass in SI?

kilogram (kg)

What are the base units of Time?

second (s)

What are the base units of Force in ENG?

pound (lbs)

What are the base units of Force in SI?

Newton (N)

What is the conversion of cm to in?

2\.54 cm = 1 in

What is the conversion of lbs to kg?

2\.2 lbs = 1 kg

What is the conversion of N to lbs?

4\.448 N = 1 lbs

sin(θ) =

opp/hyp

cos(θ) =

adj/hyp

tan(θ) =

opp/adj

What is the Law of Sines?

sin(θa)/A = sin(θb)/B = sin(θc)/C

What is the Law of Cosines?

a = √b² + c² - 2bc(cos(α))

b = √a² + c² -2ac(cos(β))

c = √a² + b² - 2ab(cos(γ))

What is Newton’s Law of Mutual Gravitation?

FA = G(m1m2/r²)

What is the vale of the G constant?

6\.67 x 10^⁻¹¹ m³/kgs²

Attraction grows (blank) the closer you get.

exponentially