What is change in position What is change

What is change in position?

What is change in position? Example: What is the car’s change in position from 3 to 5 seconds ?

Now graph this event What does the shape of the graph tells us about the motion? How could you show zero motion (lets say the car stopped)

Now calculate the slope of this event What dos the slope of a p-t graph show us? Does the slope equation resemble a general motion equation?

d 0 t Slope = - m/s The slope of a p-t graph shows velocity

d 0 t Slope = The + m/s slope of a p-t graph shows velocity

d 0 t Slope = The Zero slope of this graph shows no D d

What is the slope telling us now?

DSlope = m/s Positive Negative v Positive v Negative If the slope is increasing, the quantity(v) is increasing! v v

The slope that is tangent to the curve is instantaneous velocity d Slope = + m/s t

v 0 Slope= t m The /s 2 slope of a v-t graph shows acceleration

v 0 t Slope= m - /s 2

v 0 t Slope= m / s 2 = zero? Does that mean there is no velocity

v t Slope= m / s 2

0 v -10 t Slope= m/ s 2

v (m/s) +10 (+) 0 -10 t (s) Shaded Area = bh= displacement

+20 Area = 1/2 bh v (+) 0 t

+20 v Area = 1/2 bh 0 (-) -20 t

1. A car starts at x=3 m. It moves forward 6 m then reverses back to 4 m. Find the car’s new position, its displacement and distance covered! X pos= Dx = Distance= 0

1. A car starts at x=3 m. It moves forward 6 m then reverses back to 4 m. Find the car’s new position, its displacement and distance covered! X pos= + 5 m “Where you are” Dx = +2 m “Where you are compared to where you started” distance= 11 m 0 “Total steps you took” 3 5 9

Day 2

White Board Practice Small skills quiz checkpoint

1. At the start of a basketball game the guard starts at x = 0 m. In the first five possesions of the game she goes to positions of +4 m, -8 m, -2 m, +1 m, and then +7 m before the whistle blows! Find the new position, her displacement and distance covered! X pos= Dx = distance= 0

1. A car starts at x=3 m. It moves forward 6 m in 1 second, then reverses back to 4 m in 1 second. The car also stands still for 2 seconds after that, because the driver passed out…. Graph the car’s motion and find the car’s position, displacement and distance from the graph, Calculate the velocity On each slope. 0 t

1. An object moves as shown below on a distance time plot IV a) Which part shows the greatest displacement III I b) Which part shows no displacement II c) Which part has the greatest acceleration d) Which part shows the greatest velocity 0 t