d=0.005s^2+0.2s where d is the stopping distance in meter and s is the speed in km per hour. use the formula to find the stopping distance when a car is travelling at 70km per hour.
my answer is 38.5 is that right.
d = .005 (70)^2 +.2(70)
= 24.5 + 14
= 38.5 yes
thankyou
To find the stopping distance when a car is traveling at 70 km per hour using the given formula, we need to substitute the value of "s" into the equation and calculate the value of "d."
Given: d = 0.005s^2 + 0.2s
Step 1: Convert the speed from km per hour to meters per second.
1 km = 1000 meters, 1 hour = 3600 seconds
70 km/h = (70 * 1000) / 3600 meters/second = 70000/3600 ≈ 19.44 meters/second
Step 2: Substitute the value of "s" into the equation.
d = 0.005(19.44)^2 + 0.2(19.44)
d = 0.005 * 377.6352 + 3.888
d = 1.888176 + 3.888
d ≈ 5.776176
Therefore, the stopping distance when a car is traveling at 70 km/h is approximately 5.776176 meters.
Your answer of 38.5 is not correct.