Rocketry: Concepts About Motion

Key Words  - Position  - Speed  - Velocity  - Units  - Metrics  - Conversion  - Position  - Speed  - Velocity  - Units  - Metrics  - Conversion

Metric System  International System of Units (SI)  Giga, Mega, kilo, hecto, deka, base unit, deci, centi, milli, micro, nano, pico  Based upon units of ten  Mean of conversion  Decimal  Multiplication  International System of Units (SI)  Giga, Mega, kilo, hecto, deka, base unit, deci, centi, milli, micro, nano, pico  Based upon units of ten  Mean of conversion  Decimal  Multiplication

Problem 1 -You travel from Cary Academy (1500 N. Harrison Ave.) to Duke University (sorry UNC fans) in 25 minutes (use km) -What is your speed? -What is your velocity? -What units do you use? -Convert this to meters/min. -You travel from Cary Academy (1500 N. Harrison Ave.) to Duke University (sorry UNC fans) in 25 minutes (use km) -What is your speed? -What is your velocity? -What units do you use? -Convert this to meters/min.

Problem 2  A rocket takes off from the launch pad and travels 30 meters in 12 seconds, what is its velocity?  Convert this number to km/sec.  Convert this number to km/min.  A rocket takes off from the launch pad and travels 30 meters in 12 seconds, what is its velocity?  Convert this number to km/sec.  Convert this number to km/min.

Speed vs. Velocity?  What is speed?  What is velocity?  How do you calculate both?  V or S = ∆ D/∆ T  What is speed?  What is velocity?  How do you calculate both?  V or S = ∆ D/∆ T

Acceleration  What is acceleration?  Why does a ball accelerate when it goes down a hill?  What is acceleration?  Why does a ball accelerate when it goes down a hill?

Force  What is a force?  Examples of forces:  What is a force?  Examples of forces:

Gravity  What is gravity?  Is it a force?  Equation:  What is gravity?  Is it a force?  Equation:

Mass vs. Weight  What is mass?  What is weight?  How do you calculate weight?  What is mass?  What is weight?  How do you calculate weight?

Weight  Newtons  4.45 N = 1 pound (lb)  Newtons  4.45 N = 1 pound (lb)