Ch.11-14 Units & Variables

Distance

• Variable: distance

• Variable Symbol: d

• Unit: meter

• Unit Symbol: m

• Unit Conversion Formula: 1m = 100 cm

Height

• Variable: height

• Variable Symbol: h

• Unit: meter

• Unit Symbol: m

Length

• Variable: length

• Unit: meter

• Unit Symbol: m

Time

• Variable: time

• Variable Symbol: t

• Unit: Second

• Unit Symbol: S

• Unit Conversion Formula: 1 hr = 3600s

Speed

• Variable: speed

• Variable Symbol: S

• Unit: meter / sec

• Unit Symbol: m/s

Velocity

• Variable: velocity

• Variable Symbol: V

• Unit: meter/sec

• Unit Symbol: m/s

• Formula: v = s \div t

Acceleration

• Variable: acceleration

• Variable Symbol: a

• Unit: meter per second squared

• Unit Symbol: m/s^2

Force

• Variable: force

• Variable Symbol: F

• Unit: Newton

• Unit Symbol: N

• Formula: F = ma

Mass

• Variable: mass

• Variable Symbol: m

• Unit: kilogram

• Unit Symbol: kg

• Conversion: 1N = 101.97g

Momentum

• Variable: momentum

• Variable Symbol: P

• Unit: Kilogram meter/sec

• Unit Symbol: kg · m/s

• Formula: p = mv

Power (Watt)

• Variable: power

• Variable Symbol: P

• Unit: Watt

• Unit Symbol: W

• Conversion: 1 W = 1 J/s

Power (Horsepower)

• Variable: power

• Variable Symbol: P

• Unit: Horse Power

• Unit Symbol: hp

• Conversion: 1 hp = 746 watts

Work

• Variable: work

• Variable Symbol: W

• Unit: Joule

• Unit Symbol: J

• Conversion: 1J = 1 N\cdot m

• Formula: W = F \cdot d

Weight

• Variable: weight

• Variable Symbol: W

• Unit: Newton

• Unit Symbol: N

• Conversion: 1 N = (kg \cdot m)/s^2

• Formula: w = mg

Gravity

• Variable: gravity

• Variable Symbol: g

• Unit: meters per second squared
  Formula: F= G (m1\cdot m2/r^2)