1. A walker and a runner leave your front door at the same time.
They move in the same direction at different constant velocities.
Describe the position-time graphs of each.
2. What does the slope of the tangent to the curve on a position-time
3. If you know the position of an object at two points along its path,
and you also know the time it took to get from one point to the other,
can you determine the particle’s instantaneous velocity? Its average
4. What quantity is represented by the area under a velocity-time curve?
5. Figure 5-20 shows the velocity-time graph for an automobile on a
test track. Describe how the velocity changes with time.
6. What does the slope of the tangent to the curve on a velocity-time
7. A car is traveling on an interstate highway.
a. Can the car have a negative velocity and a positive acceleration
at the same time? Explain.
b. Can the car’s velocity change signs while it is traveling with constant
8. Can the velocity of an object change when its acceleration is constant?
If so, give an example. If not, explain.
9. If the velocity-time curve is a straight line parallel to the t-axis,
what can you say about the acceleration?
10. If you are given a table of velocities of an object at various
times, how could you find out if the acceleration of the object is constant?
11. Write a summary of the equations for position, velocity, and time
for an object experiencing uniformly accelerated motion.
12. Explain why an aluminum ball and a steel ball of similar size and
shape, dropped from the same height, reach the ground at the same time.
13. Give some examples of the falling objects for which air resistance
cannot be ignored.
14. Give some examples of falling objects for which air resistance
can be ignored.