A hockey player is standing on his skates on a frozen pond when an opposing player, moving with a uniform speed of 12 m/s, skates by with the puck. After 3.0s, the first player makes up his mind to chase his opponent. If he accelerates uniformly at 4.0 m/s, how long does it take him to catch his opponent?

In the Daytona 500 auto race, a Ford Thunderbird and a Mercedes Benz are moving side by side down a straightaway at 76.0 m/s. The driver of the Thunderbird realizes that she must make a pit stop, and she smoothly slows to a stop over a distance of 250 m. She spends 5.00 s in the pit and then accelerates out, reaching her previous speed of 76.0 m/s after a distance of 310 m. At this point how far has the Thunderbird fallen behind the Mercedes Benz, which has continued at a constant speed? m

A single-engine air plain starts its engine at one end of the runway. It accelerates at a constant rate and takes off at 38 m/s after 20 seconds on the runway, just as it is running out of runway. How long is the runway? Your Answer:

You are arguing over a cell phone while trailing an unmarked police car by 27.0 m. Both your car and the police car are traveling at 100 km/h. Your argument diverts your attention from the police car for 2.30 s (long enough for you to look at the phone and yell, "I won't do that!"). At the beginning of that 2.30 s, the police officer begins emergency braking at 5.00 m/s². (a) What is the separation between the two cars when your attention finally returns? m (b) Suppose that you take another 0.400 s to realize your danger and begin braking. If you too brake at 5.00 m/s², what is your speed when you hit the police car? km/h