instantaneous speed
DESCRIPTION
Instantaneous Speed. 10.7. Instantaneous Speed. What is it? The speed at a particular time. Any object moving at a constant speed (where distance is in equal increments), has any instantaneous speed equal to that of the constant speed (BLM 10.7 graphs 1-2). BLM 10.7 Graphs 1-2. - PowerPoint PPT PresentationTRANSCRIPT
Instantaneous Speed
10.7
Instantaneous Speed
What is it?The speed at a particular time.
Any object moving at a constant speed (where distance is in equal increments), has any instantaneous speed equal to that of the constant speed (BLM 10.7 graphs 1-2)
BLM 10.7 Graphs 1-2
Any object moving at a non-constant speed (where distance increments vary) has different instantaneous speeds depending on the instant in time. (BLM 10.7 graph 3)
From a distance-time graph, with non-
constant speed, the instantaneous speed must be calculated from the slope of the tangent at any instant in time. (BLM 10.7 graph 4)
Tangent: a straight line which touches a curve at one particular point.
From a speed-time graph, with non-constant speed, the instantaneous speed can be read directly from the axis at any instant in time. (BLM 10.7 graph 5)
Calculating the average speed of a non-
constant distance-time graphs is done through slope calculations of the line which connects the start and finish points.
Calculating the average speed of a non-constant speed-time graph is difficult and will not be covered until Physics 11.
• Practice Worksheet• Textbook Questions:
page 400-401; 1, 4, 6 ab, 7, 8 (With BLM 24)
Practice worksheet
Practice worksheet
P 400-1 #6
P 400-1 #7