Motion Maps Motion Part 3 Motion Map Parts

Motion Maps Motion Part 3

Motion Map Parts The dot: Indicates the position of the object The arrow: indicates the direction and speed of the object. (sometimes called a vector)

Vectors vs. Scalars One of the numbers below does not fit in the group. Can you decide which one? Why? 35 ft 161 mph -70° F 200 m 30° East of North 12, 200 people

Vectors vs. Scalars The answer is: 200 m 30° East of North Why is it different? All the others can be completely described with only a numerical magnitude. Numbers with that property are called SCALARS. Numbers that need both magnitude and direction to be described are called VECTORS.

Notation o Vectors are written as arrows. n n The length of the arrow describes the magnitude of the vector. The direction of the arrow indicates the direction of the vector…

Dots and Arrows Together o Dot alone = not moving. o Dot and arrow together: n Position, direction and speed.

Direction and Size o Right = positive direction o The longer the arrow, the greater the velocity. SLOW FASTER o Left = negative direction FASTEST

The grid…. o Motion Maps are drawn along a grid to show the position of the object. o Draw a minimum of 3 arrows to show a pattern. Forward, Constant Velocity, Slow Forward, Constant Velocity, Faster

More Complicated Motion… • The object moves forward at constant velocity, • then stops and remains in place for two seconds, • then moves backward at a slower constant velocity.

Example 1 The car is accelerating! Each successive arrow is longer, indicating the velocity is increasing. Draw a motion map.

Example 2 is accelerating! The car is The NOTcar moving. The car is moving at constant velocity! Each time successive arrow is A dot indicates is passing, arrows are allnothe same size, this SMALLER, indicating but The no arrow means velocity. indicates the velocity is NOT thethat velocity is decreasing changing. over time.