PHYSICS 1403-003, QUIZ 1
Chapters 1 and 2, January 28, 2005
Partial credit will be LIBERAL, provided that you show your work!
Use back if necessary!
Name: ______________________
1. (5 points)
Multiply 6.35 s by 2.145  10-4 , taking into account significant figures.
2. (5 points) CONCEPTUAL QUESTION: If the velocity of an object is zero, does it
necessarily mean that the acceleration is zero? Give a brief example to justify your answer.
3. (20 points)
At time t = 0 the brakes are applied to a bicycle at the origin. It’s initial velocity is 10 m/s
along the positive x-axis. This causes it to slow down at a constant acceleration of –0.8 m/s2.
a. How long after the brakes are applied does it take the bicycle to stop?
b. What distance does the bicycle go between the time the brakes are applied until it
stops?
c. What is the bicycle’s velocity after the brakes have been applied for 8 s?
d. How far has the bicycle moved after the brakes have been applied for 8 s?