Answer to Question #293210 in Physics for Kyle

Question

Compute

a. What is the acceleration of a car that goes from 20 to 30 mi h

in 15 s?

b. At the same acceleration, how long will it take the car to go

from 30 to 36 mi/h?

Answer 1

a. The acceleration of a car that goes from 20 to 30 mi/h in 15 s is

$$a=\Delta v/t=0.3\text{ m/s}^2.$$

b. At the same acceleration, the time it will take to go from 30 to 36 mi/h is

$$t=\Delta v/a=8.9\text{ s}.$$