motion along a straight line

1. MOTION ALONG A STRAIGHT LINE

2. LEARNING GOALS
• Describe straight-line motion in terms of average
velocity, instantaneous velocity, average acceleration
and instantaneous acceleration
• Interpret graphs of position vs time, velocity vs time,
and acceleration vs time for straight-line motion
• Solve problems involving straight-line motion with
constant acceleration, including free-fall problems
• Analyze straight-line motion when the acceleration is
not constant

3. A typical sprinter
speeds up during the
first third of a race
and slows gradually
over the rest of the
course. Is it accurate
to say that a sprinter
is accelerating as he
slows during the final
two-thirds of the
race?

4. THINK ABOUT THESE:
When you throw a baseball
straight up in the air, how
high does it go?

5. THINK ABOUT THESE:
What distance must an airliner
travel down a runway before
reaching takeoff speed?

6. THINK ABOUT THESE:
When a glass slips from your
hand, how much time do you
have to catch it before it hits
the floor?

7. MECHANICS
•Kinematics- describes
motion
•Dynamics- causes of
motion

8. STRAIGHT-LINE MOTION
•velocity
•acceleration

9. RECALL:
Vectors=
magnitude &
direction

10. STRAIGHT-LINE MOTION
Constant
acceleration
Varying acceleration

11. DISPLACEMENT, TIME &
AVERAGE VELOCITY