Day 13 in SCI110: Compound Motion
- Spring 2005 Schedule
- Last time: motion and free fall
- returned test
- Motion and free fall
- Chp 2: 22-31
- time: t
- position: x(t)
(position is a function of time)
- speed: d=rt
- velocity: combination of speed and direction
- acceleration: change in velocity
- Experiments:
- motion on a straight track
- free fall - calculation of acceleration due to gravity
- Reminder: Quiz next time (physics)
- Today:
- Some leftovers from last time:
- net force - the sum of all forces acting on an
object
- inertia - tendency of an object to maintain its
motion if the net force is zero
- free fall - fall under the force of gravity,
neglecting air resistence
- Galileo and Aristotle
- d=1/2*g*t2
- Questions: p. 45/1-3,5; Group B: 2-3
- Discuss free fall experiment
- What value of g did you get?
- SPSS
- plot distance versus time
- plot the square root of distance versus
time
- Why is the plot of velocity versus time linear?
- Compound motion
- velocity and acceleration as vectors (arrows with
length and direction)
- Practice: linear motion
- Sample motions
- Revisit Questions: p. 45 #1; Group B: 2-3
- Horizontal and vertical
- Circular
- Newton's Laws of Motion (Chp. 2: 32-38 - more next time)
- Group 1 presentation
- Projectile Motion lab (p. 61)
- Discuss group presentations (time permitting)
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