Arthur and betty start walking toward each other when they are 100 m apart. arthur has a
speed of 3.0 m/s and betty has a speed of 2.0 m/s. their dog, spot, starts by arthur's side at
the same time and runs back and forth between them at 5.0 m/s. by the time arthur and
betty meet, what distance has spot run?

What are the phases shown in a and d called?

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great. d) about 10 times as great.