Question

4. Encouraged by the success that they had with running down the mayor and other humans who were pestering their friend Phil the groundhog, the squirrels have realized that they can use their flywheel powered car to protect themselves from some dogs that have been chasing them around the park. The squirrels are sitting on their car one day, when a really furry Sheepdog named "Sir Fluffs-a-lot" sees them. Sir Fluffs-a-lot is 50 meters away, and starts running towards the squirrels. He begins accelerating at 4 m/s2 until he reaches his top speed of 12 m/s, then maintains that speed towards the squirrels Unafraid, the squirrels decide to go straight towards the dog. The squirrels take a second to get started, and then begin accelerating towards the dog at 5 m/s2 How fast are the squirrels going when they crash into Sir Fluffs-a-lot? (hint: you may want to first figure out when they collide)

Answer 1

Here we apply simple kinematics concept to determine the required quantity.

Dag SOm top pced et dog, 12M/S dag trasels 글여는 time t dutance Hexe t Ja peed the time taben to eac top +4J+ =S_sec de 43) +12(-3) T8 12 -36 D 12t-18 here z 3 sec Noe f uralshitance thaveledSo-D suirelltart ater 1aec hey reaches ^&inime JJP So-D= S) C+1-2+) 5D D 5012tt1- -St

+ FL+,i 2 S t14 136 2 2 St t4-t13. 14)2 4(13) enly pasitiue vabue of time taben 3.91 ee qrel at the So nora s time ac- o(5) .S)usc 14.55 m/s Anex M