Question

A sports car accelerates from a standing start to 85mi/h in 4.61s.

a. Find its acceleration in feet per second squared.

b. How many feet does it travel in that time?

Answer 1

change mi/hr to f/s (60mi/hr=88ft/sec)

Vf=at solve for a.

Vf^2=Vi^2=2ad solve for a. Or,

avgvelocity= Vf/2, and d=avgveloctiy*time