Spotting a police car, you hit the brakes on your new Porsche to reduce your speed from 90 mi/h to 60 mi/h at a constant rate over a distance of 200ft.

a. Find the acceleration in ft/s2.

b. How long does it take for you to reduce your speed to 55 mi/h?

c. At the acceleration obtained in part (a), how long would it take for you to bring your Porsche to a complete stop from 90 mi/h?

Question

Spotting a police car, you hit the brakes on your new Porsche to reduce your speed from 90 mi/h to 60 mi/h at a constant rate over a distance of 200ft.

a. Find the acceleration in ft/s2.

b. How long does it take for you to reduce your speed to 55 mi/h?

c. At the acceleration obtained in part (a), how long would it take for you to bring your Porsche to a complete stop from 90 mi/h?

blackstreet23 · Answer

Please help with this. I am lost :'(