PHYS 2001

1
PHYS 2001
Spring 2009
Finishing One-dimensional Kinematics I.
Acceleration II. Kinematic Equations Pick
up a colored sheet from the front table.
2
PHYS 2001
Spring 2009

• Which of the following are true about Dr.
  Chastain?
• A. He teaches this class.
• B. He is the snazziest dresser in the physics
  department
• C. He is one of the funniest people standing at
  the front of the room.
• D. He spends way too much time creating concept
  tests.
• E. All of the above.

CT1
3
PHYS 2001
Spring 2009
EX1
What is the magnitude of ?
y
60
30
x
4
PHYS 2001
Spring 2009
EX1
What is the magnitude of ?
5
PHYS 2001
Spring 2009
y
30
x
6
PHYS 2001
Spring 2009

• A ball rolls up an inclined ramp. In which
  direction does the acceleration vector of the
  ball point?
• A. Up B. Down
• Down the ramp D. To the left
• E. To the right

CT2
7
PHYS 2001
Spring 2009

• An object is moving in the negative direction and
  also accelerating in the negative direction.
  What must be true about the speed of the object?
• It is speeding up
• It is slowing down
• Its speed is not changing

CT3
8
PHYS 2001
Spring 2009
EX2
A fighter jet lands on a carrier traveling at 140
m/s. The tailhook and wire provide an
acceleration to stop the jet whose magnitude is
70 m/s2. How long does it take the jet to stop?
9
PHYS 2001
Spring 2009
EX3
Two cars approach each other on a straight
stretch of highway. The first car is traveling
East at 25 m/s and the second car is traveling
West at 35 m/s. (a) If the cars are initially
400 m apart, how long does it take for the cars
to pass each other?
Two cars approach each other on a straight
stretch of highway. The first car is traveling
East at 25 m/s and the second car is traveling
West at 35 m/s. (b) How far have each of the
cars traveled when the pass each other?
10
PHYS 2001
Spring 2009