A vehicle leaves a skid mark of 40 ft before stopping. What has the approximate speed of the vehicle before it stopped?
(the formula is speed=.7 times length, then find the square root times 5.5)
Is is 25-35 mph?
40 x .7 = 28
sq root of 28 is 5.291502622
multipy that by 5.5 = 29.10326442mph
To find the approximate speed of the vehicle before it stopped, we can use the provided formula:
speed = 0.7 * length of skid mark
In this case, the length of the skid mark is 40 ft. So we have:
speed = 0.7 * 40
Next, we are instructed to find the square root of the result and multiply it by 5.5:
speed = sqrt(speed) * 5.5
Let's calculate the result step by step:
speed = sqrt(0.7 * 40) * 5.5
First, we calculate the value inside the square root:
speed = sqrt(28) * 5.5
Next, we find the square root of 28:
speed = 5.29150262 * 5.5
Finally, we multiply the result by 5.5 to get the final speed:
speed ≈ 29.10326421
Therefore, the approximate speed of the vehicle before it stopped is approximately 29.1 mph.