h An automobile moving along a straight track changes its velocity from 40 m/s t

Question

h An automobile moving along a straight track changes its velocity from 40 m/s to 80 m/s in a distance of 300 m. What is the (constant) acceleration of the vehicle during this time?

Listed below are the arrival delay times (in minutes) of randomly selected airplane flights from one airport to another. Negative values correspond to flights that arrived early before the scheduled arrival time, and positive values represent lengths of delays. Find the range, variance, and standard deviation for the set of data. Some of the sample values are negative, but can the standard deviation ever be negative? -8 -23 -10 -11 14 -10 -11 The range of the sample data is 37 minutes. (Round to one decimal place as needed.) The variance of the sample data is minutes^2. (Round to one decimal place as needed.) Enter your answer in the answer box and then click Check Answer.

Explanation / Answer

Here,

u = 40 m/s

v = 80 m/s

d = 400 m

let the acceleration is a

Using third equation of motion

v^2 - u^2 = 2 * a * d

80^2 - 40^2 = 2 * 400 * a

a = 6 m/s^2

thhe acceleration of the car is 6 m/s^2

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