Physical Science Final 1st Semester 2012

Kilo means 1,000 100 .01 .001

SI temperature Degrees C Degrees F K S

.32 L = _______ ml 320 3.2 32 .32

Technology is Applied science Energy Matter Pure science

Gathering info through the senses Analysis Observation Hypothesis Inference

A factor that does not change in an experiment Constant Control Dependent variable Hypothesis

A factor that DOES change is Independent variable Constant Control Observation

Motion is a change in Time Speed Velocity Position

A speedometer shows Instantaneous speed Constant speed Average speed Velocity

3 m/s North Speed Velocity Position Acceleration

vf-vi/t = Velocity Speed Acceleration Momentum

Upward force on a falling object Air resistance inertia Momentum Velocity

F = ma Newton’s first law Newton’s second law Newton’s third law Conservation of momentum

Path of a projectile is Curved Always horizontal Always vertical Straight

Gravity depends on Friction Inertia Mass and distance Speed and direction

P= mv Friction Inertia Momentum Position

To every action there is an equal and opposite reaction. Conservation of momentum Newton’s 1st law Newton’s 2nd law Newton’s 3rd law

300 N acts on a 25 kg object. Acceleration =? m/s2 7500 300 25 12

The end