1. The \"reaction time\" of the average automobile driver is about0.7s . (The reaction time is the interval between the perception ofa signal to stop and the application of the brakes.) An automobilecan slow down with an acceleration of 10.2ft/s2 .
Part A: Compute the total distance covered incoming to a stop after a signal is observed from an initialvelocity of 15.6mi/h . (in a school zone)
Part B Compute the total distance covered incoming to a stop after a signal is observed from an initialvelocity of 54.0mi/h .
Answers must be in ft.
2. A rock is thrown vertically upward with a speed of 11.0m/sfrom the roof of a building that is 50.0mabove the ground. Assumefree fall.
Part A In howmany seconds after being thrown does the rock strike theground?
Part B What isthe speed of the rock just before it strikes the ground?
3. The rocket-driven sledSonic Wind No. 2, used for investigating the physiological effectsof large accelerations, runs on a straight, level track that is1080 m long. Starting from rest, it can reach a speed of 1610km/hin 1.60s .
Part A Computethe acceleration in m/s2.
Part B Computethe acceleration in g
