# Question: In the 1960s there was a contest to find the

In the 1960s there was a contest to find the car that could do the following two maneuvers (one right after the other) in the shortest total time: First, accelerate from rest to 100 mi/h, (45.0 m/s), and then brake to a complete stop. (Ignore the reaction time correction that occurs between the speeding-up and slowing-down phases and assume that all accelerations are constant.) For several years, the winner was the “James Bond car,” the Aston Martin. One year it won the contest when it took a total of only 15.0 seconds to perform these two tasks! Its braking acceleration (deceleration) was known to be an excel-lent 9.00 m/s2.

(a) Calculate the time it took during the braking phase.

(b) Calculate the distance it traveled during the braking phase.

(c) Calculate the car’s acceleration during the speeding-up phase.

(d) Calculate the distance it took to reach 100 mi/h.

(a) Calculate the time it took during the braking phase.

(b) Calculate the distance it traveled during the braking phase.

(c) Calculate the car’s acceleration during the speeding-up phase.

(d) Calculate the distance it took to reach 100 mi/h.

## Relevant Questions

Let’s investigate a possible vertical landing on Mars that includes two segments: free fall followed by a parachute deployment. Assume the probe is close to the surface, so the Martian acceleration due to gravity is ...A Superball is dropped from a height of 2.5 m and rebounds off the floor to a height of 2.1 m. If the ball is in contact with the floor for 0.70 ms, determine (a) The direction and (b) Magnitude of the ball’s average ...(a) Can a vector be less than one of its components? (b) How about equal to one of its components? A baseball player hits a home run into the right field upper deck. The ball lands in a row that is 135 m horizontally from home plate and 25.0 m above the playing field. An avid fan measures its time of flight to be 4.10 s. ...(a) If each of the two components (x and y) of a vector are doubled, (1) the vector’s magnitude doubles, but the direction remains unchanged; (2) the vector’s magnitude remains unchanged, but the direction angle doubles; ...Post your question