Physics

• Physics is the science of matter and its motion.
• Distance is how far something has traveled.
• d = vt is the formula for distance.
• Displacement is distance with direction.
• Displacement is the difference between the final and initial position.
• D=PF - PI is the formula for displacement
• Scalar quantities are mostly positive, but negative in the likes of electric charge and temperature.
• Scalar quantities have only the magnitude
• Vector quantities have magnitude and direction
• Speed is how fast or slow something is moving
• Velocity is speed with direction
• The formula for speed is v=d/t . Total distance being "d" and time being "t"
• The formula for velocity is v=d/t . Total displacement being "d" and time being "t"
• 45 m/s is Speed
• 30 m/s going West is Velocity
• Distance and Speed is always positive
• Displacement and velocity can be negative
• 200 miles is distance
• 300 miles going north is displacement
• 2 m/s is speed
• 4 m/s going up is velocity
• 24 meters is distance
• 24 meters going down is displacement
• Δ or Delta means "changes of"
• Acceleration is how fast velocity is changing per unit of time.
• a= Δv/Δt is the formula for acceleration
• If a car can go from 0 to 60 mph per 5 seconds and a truck at the same distance for 30 secs, what has the greater acceleration

  Car
• The unit of measure used in acceleration is m/s^2 . Since acceleration is the changing of velocity and is equal distance over time with the unit "meter" and "second," and acceleration is velocity over time it would make "second" raised to 2
• a= Vf -Vo/ t which means final velocity minus initial velocity over time is another formula for Acceleration
• Vf= Vo + at is the formula for final velocity
• When acceleration is positive, the velocity is rising
• When acceleration is negative, the velocity is falling
• When the acceleration and velocity have same signs, the object is speeding up
• When acceleration and velocity have different signs the object slowing down
• We can say that Speed is equal to the absolute value of velocity
• Gravitational acceleration is the acceleration due to gravity
• The gravitational acceleration of earth is -9.8 m/s^2
• The gravitational acceleration of the moon is -1.6 m/s^2
• Gravitational acceleration can only affect Vertical motion.

  True
• If a ball is released from rest the initial velocity is 0