Science Starter!

Complete the worksheet “Science Starter!” (on teacher’s desk).

Analyzing “x vs. t” graphs1. What is the total distance traveled by the object from t= 0s to t = 30 s?

(A) 30 m(B) 0 m TOTAL = 50 m(C) 20 m

2. What is the displacement of the object from t= 0s to t = 30 s?

t = 0s: object is at 0 mt = 30s: object is at 10 mΔ x = x – xo

Δ x = 10 – 0 = + 10 m

Average SpeedOn the graph shown, determine the average speed from t = 0s to t = 30s.

𝑨𝒗𝒆𝒓𝒂𝒈𝒆𝑺𝒑𝒆𝒆𝒅=𝑫𝒊𝒔𝒕𝒂𝒏𝒄𝒆𝑻𝒊𝒎𝒆

𝑨𝒗𝒆𝒓𝒂𝒈𝒆𝑺𝒑𝒆𝒆𝒅=𝟓𝟎𝒎𝟑𝟎 𝒔

Average VelocityOn the graph shown, determine the average velocity from t = 0s to t = 30s.

𝑨𝒗𝒆 .𝑽𝒆𝒍𝒐𝒄𝒊𝒕𝒚=𝑫𝒊𝒔𝒑𝒍𝒂𝒄𝒆𝒎𝒆𝒏𝒕

𝑻𝒊𝒎𝒆

𝑨𝒗𝒆 .𝑽𝒆𝒍𝒐𝒄𝒊𝒕𝒚=+𝟏𝟎𝒎𝟑𝟎 𝒔

Average Velocity (Slope Method)On the graph shown, determine the average velocity from t = 0s to t = 30s.

2. Find the slope of this line:

(10 – 0) m = + 0.33 m/s (30 – 0) s

1. Draw a line connecting the two points.

1. Describe the motion depicted in this particle model.2. Create a data chart and graph the motion shown.

Time (s)

Distance (m)

0 01 2.5

2 7.5

3 17.5

4 32.5

5 550 1 2 3 4 5 6

0

10

20

30

40

50

Particle Model Graph

Time (s)

Dis

tanc

e (m

)

AccelerationRate at which the velocity of an object changes.

VectorSymbol: “a”Unit: m/s2

Key Ideas to RememberOn a “Position vs. Time” graph:

∙ Linear Line: Constant Velocity- Positive Slope: Moving in (+) Direction (forward)- Negative Slope: Moving in (-) Direction

(backward)- Zero Slope: Not Moving (stopped)

* Speed: Distance / Time* Velocity: Displacement / Time

- Average Velocity: Slope between any two points- Must include either (+) or (-)

∙ Curved Line: Acceleration