9.5 The velocity versus time graph of an ant is
shown. What is the ant's acceleration at (a)
t = 1.0 s, (b) t = 3.0 s, and (c) t = 5.0 s?
(a) cm/s^2
(b) cm/s^2
(c) cm/s^29.6 The driver of a jet-propelled car is hoping to break the world record for ground-based travel of 341 m/s. The car goes from
rest to its top speed in 26.5 seconds, undergoing an average acceleration of 13.0 m/s^2. Upon reaching the top speed, the
driver immediately puts on the brakes, causing an average acceleration of í5.00 m/s^2 , until the car comes to a stop. (a) What
is the car's top speed? (b) How long will the car be in motion?
(a) m/s
(b) s
9.7 A particle's initial velocity is v. Every second, its velocity doubles. Which of the following expressions would you use to
calculate its average acceleration after five seconds of motion?
32 v/5 2 v 31 v 31 v/5Section 10 - Instantaneous acceleration
10.1 The velocity versus time graph for a pizza
delivery driver who is frantically trying to
deliver a pizza is shown. (a) During what time
interval is he traveling at a constant velocity?
(b) During what time interval is his
acceleration 5.0 m/s^2? (c) During what time is
his acceleration negative?
(a) i. 0 to 1.0 s
ii. 1.0 s to 2.0 s
iii. 2.0 to 4.0 s
iv. During no time interval
(b) i. 0 to 1.0 s
ii. 2.0 to 4.0 s
iii. 4.0 to 5.0 s
iv. During no time interval
(c) i. 0 to 1.0 s
ii. 2.0 to 4.0 s
iii. 4.0 to 5.0 s
iv. During no time interval
Section 13 - Interactive problem: what’s wrong with the rabbits?
13.1 Use the information given in the interactive problem in this section to find the rabbits that do not have a constant acceleration.
Which are the faulty rabbits? Test your answer using the simulation.
The brown rabbit
The tan rabbit
The white rabbit
The grey rabbit
The black rabbitSection 15 - Motion equations for constant acceleration
15.1 The United States and South Korean soccer teams are playing in the first round of the World Cup. An American kicks the
ball, giving it an initial velocity of 3.6 m/s. The ball rolls a distance of 5.0 m and is then intercepted by a South Korean player.
If the ball accelerates at í0.50 m/s^2 while rolling along the grass, find its velocity at the time of interception.
m/s15.2 Which one of the following equations could be used to calculate the time of a journey when the initial velocity is zero, and the