9. You are walking down a straight path in a park and notice there is another person walking some distance ahead of you. The nin distance between the two of you remains the same, so you deduce that you are walking at the same speed of 1.21\text! an Leari m/s]\text{.) Suddenly, you notice a wallet on the ground. You pick it up and realize it belongs to the person in front of you. To catch up, you start running at a speed of 2.55\text { m/s}\text{.} It takes you 17.5\text{ s} to catch up and deliver the lost wallet. How far ahead of you was this person when you started running?

10. A rocket is launched from rest with a time-dependent upward acceleration \(a(t): = n - ft\text(.}) Find an expression for the maximum upward speed of the rocket in terms of \(nI) and KAtext{.}) \(V_{Itext max }}=))

12. cceleration of 3.75\text ( m}Atext{s]^{2} during 2.85\textA small coin, initially at rest, begins falling. If the clock starts when the coin begins to fall, what is the magnitude of the coin's displacement between t \text{11 = 0.250 \text! s} and t '\text2} = 0.499 ltext! { s,} a car reaches a velocity of 14.7\ext! Which equation would be most useful for finding the initial velocity of the car?

13. A busy chipmunk runs back and forth along a straight line of acorns that has been set out between its burrow and a nearby tree. C Macmillan Learn 14. At some instant, it moves with a velocity of -1.07 m/s. Then, 2.57 s later, it moves with a velocity of 1.79 m/s. What is the chipmunk's average acceleration during the 2.57s time interval? 15. Starting from a location with position vector Wr_(1,x} nin -16.5 \text{ m}W) and Wr_(1,y} = 28.3\text { m]W), a rabbit hops around for \13.7)) seconds with average velocity WV_{av,x] -2.57 text{ m/s}I) and W(v_{av,y} = 1.55 \text( m/s}W). Find the components of the position vector of the rabbit's final location, W(r_(2.x]W) and Wr_(2.y]11). Ir 12.x|=11) Ir ltextfm? I 1r 12.y1=1 I \text{m] W)

17. An undiscovered planet, many lightyears from Earth, has one Learnin moon in a periodic orbit. This moon takes time anl [Variable Error] on average to complete one nearly circular revolution around the unnamed planet. If the diameter of the acmi moon's orbit is [Variable Error], calculate the moon's radial = (or centripetal) acceleration ac