1.) A traffic-safety engineer is designing a declaration lane. She is basing the length of this lane on the distance needed to slow down from 126 km/h to 65 km/h in 8.0 s. How long will the deceleration lane be?



A. 2.1 * 10^2 m

B. 3.8 * 10^2 m

C. 4.2 * 10^2 m

D. 7.6 * 10^2 m



2.) A skydriver steps out of a helicopter hovering thousands of metres above ground. After 3.5 s of free fall the skydriver pulls the rip cord. What is the skydriver's displacement during the 3.5 s free fall.



** I have been stuck on these two of my homework questions for a while now. It's due soon, so I appreciate your help and if you would kindly give me the answer using detail (formulas...) or else I won't get the full marks **

Thanks in advance! :)